Accelerator/Chronology (Toaru Majutsu no Index)

* Anime
* Novel
* Novel (GT)
* Manga
* Railgun
* Accelerator
* Imaginary Fest
* Imaginary Fest (GT)

## Abilities

### Esper Power

**Accelerator** (一方通行 (アクセラレータ) , *Ippō Tsūkō (Akuserarēta)*?, lit. "One-Way Road")

## Debuts

### Manga

Index Chapter 11
 Railgun Chapter 22
Accelerator Chapter 1
 Dark Matter Chapter 1 (Cameo)

### Anime

Index Episode 10
Railgun S Episode 5
Accelerator Episode 1

### Video Game

Index PSP Game

This article covers Accelerator's chronological history in *Toaru Majutsu no Index*.

## Chronology

### Toaru Majutsu no Index

#### Sisters Arc

*Main article: Sisters Arc*
In one of the battles, he kills a clone in a vicinity near Kamijou Touma. This event causes Touma to intervene in the experiment. Touma, using the logic that if the weakest Level 0 (Touma) can defeat the strongest Level 5 (Accelerator) then the experiment will fall apart, as the prevailing condition that Accelerator is the strongest esper would be nullified.

Accelerator is later seen in another fight against Misaka 10032, where he tells her that he wants to gain a status that is beyond simply being the strongest in Academy City - he wants to attain Level 6, so that challenging him would be an unimaginable thought- even a sin. They are interrupted by Kamijou Touma who challenges him to battle just as Accelerator was about to finish the clone off. Initially seeing Touma as a weakling, he later panics and is confused as to why Touma was capable of blocking his abilities. Eventually, Touma is able to beat Accelerator using his street fighting skills, exploiting Accelerator's physical weakness (due to the nature of his power, he always defeated his foes with a single hit and never took damage, he therefore had no experience in hand-to-hand combat as his opponents could never reach him), and ending the experiment.

#### Three Stories Arc

*Main article: Three Stories Arc*
After his defeat, Accelerator notices that something has changed within him as evidenced by the lack of his usual aggressive behavior when confronted by delinquents, who now believe that Accelerator is actually weak, attacking him with increasing frequency. During one of his trips to buy coffee, Accelerator meets a hooded figure who had been following him for some time. After an awkward meeting, the figure identifies herself as Misaka Serial Number 20001 or better known as Last Order. She explains that she was released from her incubation tank prematurely and requests for Accelerator's help to contact the researchers, to which he nonchalantly refuses. Despite the rejection, Last Order continues to follow Accelerator where they discover that his room had been severely vandalized by delinquents. Although Accelerator urges her to think twice about staying in his destroyed home, Last Order still persists in accepting his hospitality as she wants to be with someone. This baffles Accelerator, though he allows her to stay.

The next day, Accelerator brings Last Order out to a restaurant for a meal, where he notices Amai Ao, a scientist involved in the Sisters project, acting suspiciously before fleeing after being spotted by Accelerator. Here, Accelerator confronts Last Order over her care-free attitude towards him, reminding her of his role in the Level 6 Shift Project. Here, Last Order gives a psychoanalysis of Accelerator based on the actions he committed and deduces that Accelerator did not join the experiments willingly, therefore she bears no grudge against him and actually thanks him as his existence allowed the clones to be created. Accelerator refutes her claim, stating that his continuous killing of the Sisters proved that he did not care for their lives, but Last Order points out that he attempted to communicate to the Sisters in a harsh manner so as to discourage them from fighting him and believes that he never wanted to hurt them. Slightly disturbed and annoyed by her lecture, Accelerator leaves Last Order in the restaurant although he shows some concern for her as she nearly passes out after their talk.

Walking through the streets, Accelerator finds himself at one of the warehouses used in the Sisters project, confused by his intentions to help Last Order. Inside the facility, Accelerator meets an old acquaintance of his, Yoshikawa Kikyou whom he asks for equipment and instructions to help Last Order. Here, Yoshikawa reveals that Last Order is actually the Administrator of The Misaka Network and Ao has inserted a virus that will cause the Sisters to rampage out of control. Unexpectedly, Accelerator decides to recover Last Order in order to save her but is too late as Ao abducts her. However, Accelerator easily locates and incapacitates Ao before securing Last Order. Suddenly, the virus within Last Order begins to prime itself for activation, surprising Accelerator and Yoshikawa who initially thought the virus would activate much later. Despite Yoshikawa's insistence, Accelerator refuses to kill Last Order and instead uses his Vector Change to control Last Order's bioelectric frequency and delete the virus from within. Accelerator focuses his entire computation abilities on deleting the virus which leaves him defenseless against a recovered Ao, who shoots Accelerator in the head. Despite Ao's shot, Accelerator manages to erase the virus and save the world and the Sisters from each other. Accelerator is brought to a certain hospital where Heaven Canceller tells Yoshikawa that the bullet fragments in Accelerator's skull have damaged his computation, mobility, and language abilities, effectively crippling him. Accelerator is forced to wear a choker-style electrode that connects him to the Misaka Network. This is used to compensate for his language, mobility, and calculation skills as well as his Esper Ability, although it has been stated that he only has less than half of his original processing ability, thus making him weaker. Also, the choker has a rechargeable battery that keeps the terminal on the choker running, but the energy consumption of the choker differs greatly when used normally (a few days) to when used for his vector calculations (15~30mins upgraded).

#### Kazakiri Hyouka Arc

*Main article: Kazakiri Hyouka Arc*
In the anime adaptation, at the end of the arc Accelerator is seen sleeping in a hospital room with Last Order sleeping on a chair next to his bed.

#### Tree Diagram Remnant Arc

*Main article: Tree Diagram Remnant Arc*
Accelerator sneaks out of the hospital he was in to destroy the remnants of Tree Diagram, as a request by Last Order. He meets with a weakened Musujime Awaki who carries a remnant of Tree Diagram, irritated by the fact that he was forced to help out and his opponent was only a "stupid looking third rate" like her. Although Awaki is aware of Accelerator's weakened state and believed that she could match him now, Accelerator is unperturbed. Simply replying that him being weaker doesn't make her any stronger, he quickly defeats her and destroys the remnants of Tree Diagram, ensuring that it will never be rebuilt.

#### Academy City Invasion Arc

*Main article: Academy City Invasion Arc*
Accelerator, along with Last Order, leaves the hospital and moves into the apartment of the Anti-Skill Yomikawa Aiho as a request from her friend Yoshikawa Kikyou. Accelerator was reluctant since having him next to her would put her and others in high danger because of his enemies.

Later on, after a short nap, he realizes Last Order has gone missing, prompting him to search for her. During that time, he bumps into Index, not knowing her connection with Touma, and even treats her with food - costing him all of his pocket money. They separate as Index spots Touma amongst a crowd and runs towards him, just as Last Order runs to Accelerator. Because he wasn't in the mood to search for her again, he tells Last Order to keep quiet but she trips, almost crying because of some scraping on her hands and knees. Accelerator goes for some medicinal bands at a nearby pharmacy, but upon returning he is hit by a black van from the black-ops known as *Hound Dogs*, who were under the orders of Kihara Amata, the man who discovered his powers.

Amata's orders were to retrieve Last Order, but he decides to beat Accelerator to a pulp first, as he knows his powers inside out, including how to turn Accelerator's redirection against him and even negate his wind-based powers. In desperation, Accelerator blasts the captive Last Order away from the Hound Dogs with a wind blast, then manages to escape Kihara and his men by way of a chance distraction by an aloof Index, who came looking for him to return a pack of tissue he gave her. Just as Amata launches a homing missile at Accelerator and Index's getaway van, he is interrupted by Vento of the Front's arrival, letting the two escape.

Accelerator, considering Index dead weight, decides to drop Index off at the hospital where Heaven Canceller works, misleading her into thinking he needed a replacement battery for his choker electrode and having her fetch it (no replacement exists). He then sets off to kill Kihara Amata, crush the Hound Dogs and save Last Order, but decides to just focus on saving Last Order after a jarring conversation with Heaven Canceller, who reveals to him that he knows far more darkness than even Accelerator has encountered. Accelerator attempts to shake off the pursuing Hound Dogs temporarily but eventually resolves to force Kihara Amata into re-evaluating his priorities away from Last Order (and towards eliminating him) by wiping out his Hound Dogs. Unfortunately, after wiping out two whole squads with psychological tactics alone (conserving his remaining 7 minutes of active esper power), he snaps and goes all-out at a taunting, fleeing Hound Dog who manages to seek aid from two surviving Anti-Skills, and ends up on the Anti-Skills' wanted report.

After receiving a call from Touma (whose voice he fails to recognize) regarding Last Order's whereabouts, he gets a lead from a call from Kihara Amata, who now has Last Order captive, and breaks into one of Academy City Board of Directors' homes, digging up Amata's (and Last Order's) whereabouts. He attacks Amata's compound, but runs out of battery charge without being able to bring him down, yet ultimately kills him as he first "awakens," having an epiphany right as he was to be finished off. This is symbolic because the god that Accelerator`s power just happens to resemble is Osiris, the Egyptian god of the dead.

#### Document of Constantine Arc

*Main article: Document of Constantine Arc*
Academy City put Accelerator in charge of the operation to subdue the problem with Terra of the Left in Avignon. Hundreds of HsPS-15 AI suits and eight HsB-02 planes were sent and proceeded to tear apart the city, using speed to create vacuums after the plane's path and sending iron sand into the vacuum to make it explode. Accelerator tells them to change their plans to bomb just the Palais des Papes instead of bombing whole Avignon, the order being approved when the pilot he was with checked with the higher ups.

At the end, Itsuwa sees Accelerator in the middle of the scorching flames caused by a HsB-02. Accelerator is speaking with one of the higher ups of Academy City on the phone, telling them to send troops to come search for Terra's corpse and to run DNA Tests to see if he's really dead. However, he didn't notice Touma and/or as they are covered by the steam. Accelerator leaves soon after to a deeper part of the palace. Itsuwa says she finds Accelerator, who is able to stand in the middle of such flames, to be even more terrifying than Terra.

#### Battle Royale Arc

*Main article: Battle Royale Arc*
It is unknown how many days Accelerator spent in Avignon for his mission there, though when he returned he was immediately pulled into a mission for GROUP. Before doing so, Accelerator apparently realized the need to acquire the designs for his Calculation assistance device.

After Last Order leaves in a taxi after being released from the hospital, the Heaven Canceller goes to a vending machine to get some coffee, to which a gun is immediately pointed to the back of his head by Accelerator, newly arrived from Avignon. He demands from him the designs of the electrode as he is the inventor. He asks why he needs it and asks him why he isn't he letting him fix it if it’s not working, though Accelerator does not tell. Heaven Canceller carries the conversation and tells Accelerator that Last Order wanted to see him, to which Accelerator says it has nothing to do with him. However, Heaven Canceller rebuts this, saying that she was his patient who wanted to see him and arranging that is his job, leading to Accelerator to complain. The doctor takes out from his coat a USB stick and hands it to Accelerator, making him note of his preparedness, leading to the doctor say that is his job to prepare for his patients like Accelerator. As he waits for his cup to fill with coffee from the machine, he tells Accelerator that it'd be difficult to apply its contents as he created the important parts himself, and says that of if he wants to make an identical electrode he needs to manufacture those using machine tools. Accelerator hears but doesn't answer, taking the USB with him and silently departed. The doctor then turns around and finds Accelerator gone as his coffee has been prepared. After the higher-ups have manipulated to have the Anti-Skill swarm in on Family Side, Tsuchimikado Motoharu and Musujime Awaki are in the Family Side fifteen minutes after the explosion. While Awaki is disappointed with the destruction of evidence, Accelerator appears before them. Motoharu asks if he has finished with his errand, though he tells him to shut up. Accelerator then asks if this was the spot where Unabara Mitsuki (Etzali) disappeared to. Motoharu confirms it and tells them that Management is currently being transported for interrogation, though he doubts he can get much from it, as such he sent Etzali to Management's apartment for data but mentions that the third floor was attacked and that the appliances have been taken away, something that Etzali mentioned in his report to him before the explosion. Awaki however points out that not all have been taken away, and shows a microwave oven blackened by the explosion, believing that it was probably not loaded with AI and as such cannot be inputted with additional information. As Accelerator whines about their situation, he kicks on the microwave oven only to discover stacks of money inside it. Awaki notes that the bills have anti-counterfeiting IC chips and that they may get some information from them, and that Etzali protected them from radio signals by using the microwave oven. Accelerator wonders if Etzali hid them and advance. Then Motoharu notices a man stuffed inside a closet and sees that the skin by the right calf leg was torn off, disturbing Awaki. Motoharu then explains the "magic" behind it, but summarizes that Unabara Mitsuki (Etzali) has the skill to substitute as other people. Motoharu says to them that Mitsuki is still alive, masquerading as one of those who attacked the apartment and he has no idea where he is. Putting the investigation on Etzali's disappearance on hold and having his fate in his own hands, GROUP continues with their original mission. They later receive word that the paddy wagon that held Management was attacked by an unknown assailant, with only him as a casualty and everyone else knocked unconscious. In their hideout in an empty store at the underground shopping center, GROUP tries to examine the paper money. Using the reader Motoharu had asked from their supplier, the machine starts analyzing. He discovers Management's shopping list, dealing with a single sniper as well a special sniper rifle, Sunazara Chimitsu and his MSR-001. Motoharu relates to them the specifications of the rifle as he continues to swipe the stacks of money for more information. By the fourth one, they find out that IC chips have been damaged, likely from heat or shock of the explosion, the stack having information regarding the business partner that hired the sniper. Giving up, Motoharu swiped the last pile of bills and discovers that they are the plans for the sniping, including the location of the sniping, the School District 7 concert hall. Motoharu notes that the plaza is being chartered for an address by Oyafune Monaka, one of the Board of Directors, and that she may be the target for assassination. He says that if that they should forget MItsuki (Etzali) to prioritize the assassination, and that the lowest "score" in the job will have to go and save him. Accelerator then whines about stopping the assassination, asking why they couldn't just stop the address. Motoharu of course gives the perfect response to this: the address has already started. Motoharu and Accelerator quickly left their hideout using Awaki's Move Point, tiring her out. With Awaki preoccupied with analyzing the rest of the IC chips, Motoharu and Accelerator have to deal with the assassination attempt about to take place. Arriving at the address, they find Monaka completely exposed in the open with only a few security guards around her. Accelerator begins whining again, and then asks why Motoharu goes out of his way to protecting her despite being a member of the Board of Directors. Motoharu then discuss to Accelerator the difference between Monaka and the other Board of Directors, whom Accelerator believes to be all scum, hence the reason Motoharu is willing to protecting her. Motoharu somehow convinces Accelerator with his argument.

The two then try to determine the strengths and weaknesses of Monaka's security, noting of its Wind Defense technology set-up against sniper attacks. Suddenly, the both of them overhear Last Order talking to someone, actually Uiharu Kazari, saying that she is looking for a "lost child", and somehow managing to end up in the plaza. This irritates Accelerator, but amuses Motoharu. However, he himself becomes serious after seeing a young girl in a maid outfit mixing among the crowd, likely Tsuchimikado Maika, realizing that there may be stray bullets. Then they realize that some of the Wind Defense deployed in the plaza aren't working, shocking Motoharu. Then they actually hear the devices being hit by Sunazara Chimitsu's bullets, scrambled into action. Motoharu tried to get closer to Monaka to relay the danger to her but was unable to do so due to the crowd. With all the Wind Defenses gone, Accelerator was forced into action. Before Chimitsu could shoot Monaka, an explosion at the corner of the concert hall front plaza was deliberately triggered by Accelerator, destroying one of the vehicles carrying a Wind Defense device. The surprise was enough for Chimitsu to miss his mark. He tries to shoot again but Monaka's bodyguards have already surrounded her and took her downstage. He shoots at his moving target but only struck one of the guards, who was knocked down but not killed because of his bulletproof equipment. Now knowing of a sniper the guards completely surrounded Monaka, hiding her behind them.

By the time Motoharu arrived at the hotel room Chimitsu has already left. He later calls Accelerator to report on that fact, but states to him that Chimitsu continuing his sniping is low. Motoharu then tells Accelerator to have Monaka's speech suspended and have it transferred after security measures are set up again. Accelerator then reports to Motoharu on how Musujime Awaki have finished analyzing the IC chips in Management's stacks of cash and tells him that SCHOOL is behind the assassination attempt. It was lunch time as they are in a camper van being driven by one of their grunts. After a few banters between each of them regarding their food choices, Accelerator asks if they have something on SCHOOL. Motoharu says that he tried accessing the Bank but discovered nothing came up other than their name, concluding that they likely have the same secrecy with GROUP. Awaki cuts in, saying that she tried to dig in as well, saying that multiple organization names like SCHOOL and GROUP came out as well, and surprising Motoharu. Awaki summarizes what she knows: GROUP, SCHOOL, ITEM, MEMBER, and BLOCK, all unofficial units created by putting a few people together. Accelerator listens on the conversation between Motoharu and Awaki where they could not confirm that it was SCHOOL that attacked Management's apartment.

The members of GROUP had finished eating their lunches separately and were now discussing their plan for the upcoming investigation, but they were immediately cut off as they receive word that the Virus Isolation Center is being hacked. Accelerator whines on how they shouldn't be the one to deal with it as there are other organizations like them, but Motoharu says that they have different duties so there is no guarantee that the organizations would act, moreover, he says that the others may have betrayed Academy City. Realizing that the hacking may be used to spread a virus from Academy City to the Internet, the External Connection Terminals have all been shut down to prevent leakage, except one, the west terminal in School District 13. Motoharu references that whoever is doing the attack may be luring them to the district. As the driver takes to them to the district, he asks them about the deal with Oyafune Monaka, where he is informed that they'll deal with it later. When asked about saving Unabara Mitsuki, he is informed that they never intended in saving him.

As they head towards the district, they are informed by the driver that there is currently an hacking on a satellite control center belonging to an aerospace engineering laboratory in School District 23. Accelerator frowns at the news as it means the hacker is targeting the Hikoboshi II, a satellite with a large caliber ground-attack laser. Awaki is uneased by the news as well, as the cracking on the Virus Isolation Center is still going. Motoharu points out that they are splitting up the counter-measure team and they just can't ignore one or the other as they don't know which one is a decoy or not.

Reaching an empasse, Accelerator says that the answer is obvious. He gets out of the RV while it is moving, already using his powers, to which Motoharu yells at him. Accelerator explains to him that he doesn't like dealing with decoys and that he's going to School District 23 to stop the hacking by destroying the antenna used to contact the satellite. He then tells them to do the odd jobs without him. Accelerator then jumps on a car, pointing a gun to its driver, saying that he'll pay him gas and labor, ordering him to go School District 23.

While in the car, Accelerator attempts to contact Anti-Skill to ask information about the satellite that is under electronic attack but the "Man on the Phone" who usually gives instructions to GROUP interrupted so Accelerator asked him instead. Accelerator asks for information about the Hikoboshi II laser, including its range. Getting all that he need from him, Accelerator hangs up. However, as soon as he does, he gets a call from Etzali. He tells Accelerator that he is currently in disguise. Accelerator assumes that he is hiding behind SCHOOL's back and says that he is busy dealing with the satellite hacking as such he can't answer his plea for rescue. Etzali clears to him that he is not with SCHOOL but with BLOCK and that they're the one who is doing the hacking. Accelerator references SCHOOL's attempted assassination with Oyafune Monaka, which surprises Etzali as he had no idea it had happened. Etzali continues with his report and says that BLOCK is the one behind the attack of teh Virus Isolation Center and one of the External Connection Terminals, doing so in order to confuse the City's network counter-measure team. Etzali says that the Hikoboshi II will fall into the hands of BLOCK in 20 minutes. Accelerator asks why School District 23 hasn't temporarily frozen the satellite control center, to which Etzali believes that the freezing it takes over an hour. Accelerator then asks Hikoboshi II, to which Etzali then concludes that they are using the laser to strike a target—School District 13, specifically the kindergartens and elementary schools. Both of them knew that attacking a district where children resided would be disastrous to Academy City, a city of schools that needs children to operate. Accelerator asks Etzali if he could stop them from where he is, to which he said he wouldn't have called. He then asks if he can evacuate the residents of School District 13, but says that it would cause panic and unfeasible as the children are outside due to the holiday. Accelerator insults Etzali for his uselessness and whines on how he has no choice but to destroy the antenna that communicates with the satellite. Etzaki agrees and says that he will continue to gather information and pass it to him when he can. Etzali then hangs up. Accelerator then tells the driver to hurry up.

The convertible Accelerator was riding in stopped near the terminal station in School District 23. After handing some money to the driver, he decides to use his powers to get to the antenna as it was still far away. However, he is then attacked from behind by Saraku before Accelerator can use his choker. Accelerator is injured but manages to get the upper hand and shoots behind is back, injuring Saraku, though without Accelerator's knowing, he manages to mess with the sight. When Accelerator turns to look at his attacker, he saw that Saraku is injured. Accelerator asks if he is from BLOCK, to which Saraku says that he is from MEMBER and that he is there to stop him from destroying the antenna. Accelerator then turns on his choker, activating his powers. As he turns around, he discovers that Saraku is already behind a railroad worker, and uses him as a hostage, using a saw to his neck. Accelerator gives a laugh, discovering the true nature of his power, that he cannot manage true teleportation's calculations and uses the positioning of other people to calculate where he can teleport. Accelerator mocks him, prompting Saraku to say that he doesn't want to hear that from him who uses a choker. Saraku says that Accelerator won't abandon the hostage as evidenced by the fact that he wouldn't have come to School District 23 in the first place to stop the Hikoboshi II. Accelerator, having now dubbed him as Kill Point, says to Saraku that he has no aesthetics of a villain and points his gun on him. Saraku however reminds Accelerator that there might be something wrong with the sights of his gun.

Realizing that he might hit the hostage instead of Saraku, Accelerator did the next best thing, he shot himself in the temple and using powers, calculated and redirected the trajectory of the bullet. This method easily fells Saraku, making him bleed on the shoulder. Accelerator then motions the railroad worker to leave. Saraku continued to face Accelerator, though tried to look around using only his eyes to find someone to teleport behind. Seeing this, Accelerator mocks him as Saraku's is consumed by fear. Accelerator then says that he will now teach him of the aesthetics he lacked and what a true first-class villain really is. Accelerator then shoots at him several times enough to incapacitate him.

Accelerator later arrives and faces against the Anti-Skill, defeating them all without killing them, and then destroys the antenna. According to the Professor, Saraku apparently survived as Accelerator didn't kill him, and advises Baba Yoshio to retrieve him if he has the time.

After the massacre near the outer wall, Motoharu and Awaki later joins up with Etzali and Accelerator. After Motoharu explains to them on how they destroyed the center of the western External Connection Terminal, Awaki asks Etzali a question if BLOCK was behind everything despite SCHOOL behind the assassination attempt of Oyafune Monaka. Etzali answers that they probably have their own plan as they caused separate incidents and that they just happen to have a point of contact with Management. Accelerator references MEMBER as well. GROUP then moves on to the area near the outer wall where the massacre happened and comes upon a survivor of the onslaught of the Six Wings. Motoharu demands answers from the man on what they were going to attack using 5,000 mercenaries. After some hesitation, the man says that they were planning on attacking School District 10, specifically the Reformatory. Hearing this, Awaki demands to know why as her comrades are being kept in the facility as well. The man tells her that they were after Move Point. Hearing her ability name being mentioned shocks her. The man says that they had information that Move Point's companions are being held in the Reformatory, and that if they capture her comrades they can negotiate with her. As she asks herself why they had to single her out, the mercenary reveals that it is because she is the guide to Aleister Crowley's Windowless Building. He says that BLOCK acquired information that the guide is Move Point despite the identity of the guide being confidential and had her investigated in order to find materials to use in a negotiation. Motoharu asks him what they were going to negotiate with the guide about, to which he says they wanted information on the route through which materials are brought into the building as so they can blow it up using a Synchronous Multilayer Bomb. The mercenary says that the chaos in the world needs to be stopped before War comes. The man continues by saying that negotiating with Move Point would be difficult, and that they worked under the assumption that she wouldn't help them. Awaki agrees, and asks if he knows who he is talking to. Horror dawns upon the man as he realizes this, before he could utter his surprise Awaki finishes cuts off, driving metal stakes all over his body, though it seemed he was still alive. Motoharu urges the others to go to School District 10 to stop BLOCK.

Traveling in an ambulance to School District 10, GROUP discusses the layout of the Reformatory, discovering that there are secret rooms for the likes of Awaki's comrades, as well as its esper countermeasures such as the AIM Jammer. Motoharu warns that they can use their powers in spite of the AIM Jammer but says that it is possible to have their powers go out of control, especially those that use complex calculations, making it dangerous for the likes of Accelerator and Awaki.

When GROUP arrives at the Reformatory, they notice that eerie lacked of gunfire. As the pass through the gate and came to a traffic circle for vehicles that shuttered prisoners around, Accelerator notices the slightly painful effects of the AIM Jammer. Luckily however, it doesn't hinder his walking, though he notes he should avoid switching over to esper mode. His thoughts on the devices used in the facility against esper facilities is cut off after they find the strange state of corpses of BLOCK mercenaries. Motoharu comments on how they all lost their lives to their own weapons, to which Etzali asks if it was suicide. However, he realizes something, but before he could speak of it there was a voice behind them.

It is Xochitl, who calls out to Etzali who was in the guise of Unabara Mitsuki. Seeing this, Accelerator thinks she's from BLOCK, but she says that she is from MEMBER, though she just used them and had no intention of joining them. Etzali reacts to Xochitl, asking for who she is, to which Xochitl responds and says his real name. Etzali was shocked and then Xochitl finally removed her disguise. Xochitl states that she needs to thank BLOCK on account of the esper powers being halved in the Reformatory as so she doesn't need to worry with his companions getting in the way. Etzali then asks why she's there, telling her that she's not supposed to have a spell that can do what she did (regarding the mercenaries getting killed by their own weapons). Etzali says that Xochitl was supposed to be in a position in their cabal that kept her away from any dirty work. She tells her reasons and that is to kill him as he had defected to Academy City. Hearing of this Tsuchimikado Motoharu realizes Etzali's situation. Etzali tells the rest of GROUP that he will deal with Xochitl while they go on ahead. He then tells to them her name is Xochitl, an Aztec magician who also belonged to the organization he was in before coming to Academy City. Xochitl then says that she only came for Etzali and doesn't care if they go off. However, she then says on how she wonders if "they" will let them. At that moment gunshots are heard, prompting Accelerator and Motoharu to take cover. Motoharu discovers that BLOCK's mercenaries were waiting to see what would happen between them, and asks Xochitl if they really have to deal with them but she just ignores him.

After Etzali later successfully takes ownership of the grimoire that took over Xochitl's body, he meets up with the rest of GROUP, all of whom were not unscathed.

Due to BLOCK's collapse things have settled down. Motoharu was taking care of wrapping things up, Awaki was taking care of her wounds, and Etzali was safe and likely took Xochitl to a hospital. Meanwhile, Accelerator went back to School District 7. He later receives a call from the GROUP liaison, though as usual he doesn't receive him well. He thanks Accelerator and GROUP for his efforts against BLOCK, saying that he is fortunate to have such capable subordinates. This however annoys Accelerator. The liaison points out however that he is thanking him from the bottom of his heart, and to prove it, gives him useful information related to Last Order's life.

Accelerator finds Kakine Teitoku torturing Uiharu Kazari for information to where Last Order's whereabouts where. After Uiharu defies Kakine, Accelerator throws a ATM vending machine at Kakine. Despite Accelerator's attack, it barely made a reaction on Kakine, saying that he was hurt. He however, says that he was irritated and that it was only right for him to come and kill him first. Accelerator mocks him however for talking and then taking a hostage (Uiharu Kazari). Kakine replies that Uiharu was only a little insurance as no one would fight Accelerator fairly.

Kakine then mocks him for believing that protecting weaklings made him out as a good guy. Accelerator however states that Kakine still doesn't understand, and that he will show him on how even villains have standards. With that the two of them clashed in the city. Kakine is knocked back by this and then smashed into a cafe. Despite this, Kakine is fine and comes out of the cafe. He notes Accelerator's power of controlling any vector and asks him what would happen if he was smash into a large mass that can't be moved regardless of all the vectors he can gather, though says that it would likely not work. He tells him that as long as his vectors aren't being controlled it is meaningless. Not only is Kakine unhurt, he was apparently enveloped by six wings like that of an angel's. Now spread behind him, Accelerator mocks him for being unoriginal, though Kakine says that he doesn't have to worry about it as he already knows.

And thus they do battle once more, and upon the air they meet. As Accelerator gets close, Kakine references the particles that make up the world, and then states that kind of knowledge doesn't apply to his Dark Matter, as it is is something that doesn't exist in the world. Despite the wings that defied the laws of physics, Accelerator's will is unshaken, and continues to come close, declaring that he will blast him and his Dark Matter as well. But Kakine says that Accelerator still doesn't understand, and then his wings projected out a light that hurt Accelerator, surprising him for he believed he could reflect all his vectors with his ability. Kakine says that it was the diffraction of sunlight through the unseen gaps of his Dark Matter wings, changing the light's nature and use it to attack him. Kakine asks him how it felt to be burned by sunlight. However, Accelerator calls Kakine a fool, saying that no matter how he diffracts sunlight, it doesn't change its nature into something like a beam of light that kills. Kakine says that would be the case for normal physics of the world, but not for his Dark Matter. With that boast, he blew a gust at wind at Accelerator, who tried to subdue the wind through the use of his reflection. As he pondered on what to do, he found Kakine smiling, saying that his reverse calculations are complete. Then, his wings struck and felled him in spite of his power. Kakine says that Accelerator is wrong that he can reflect everything as Accelerator tries to fly towards him, but his wings were ready to meet him. Kakine gives examples as he presses his advantage over Accelerator, injuring him. Here he says on how not everything is reflected by him, explaining to him that he has a subconscious filter that reflects anything that could harm him. He says that he using the energies that are infused by Dark Matter like the sunlight or the wind, he can choose which energy is the most suitable in bypassing his filter after he had analyzed it. This complicates things for Accelerator as even if changed the rules of his reflection, Kakine would merely inspect the change his Dark Matter and then continue his attack. Despite this they continued to clash. Accelerator made four tornadoes through his power, and wing by wing, Accelerator and Kakine's blew and swept each other apart. As they continued to attack each other, wreaking havoc upon their surroundings. Kakine mentions on how killing him, the #1, is the fastest method in accomplishing what he wants, which is to directly speak with Aleister himself. As they exchange blows, Kakine reasons that since Aleister has a web of plans up his sleeve, he needs to destroy all other plans, allowing him to the only viable plan left for him, the so-called "Spare Plan".

The two of them stood face to face, gauging each other. Accelerator thinks that there must be some truth to what Kakine has said about Aleister having many plans, and wonders what tragedy has struck him in the Dark Side of Academy City that shaped him to what he is to push him to what he does. Accelerator however mocks what Kakine said, to which Kakine says that despite Accelerator having the right to directly communicate with Aleister he doesn't use it and that he has no right say that to him. He tells Kakine that the moment he spoke those words of his, he became common filth passing themselves as a great villain. Kakine however is unconvinced, giving his explanation as to why, saying he doesn't want to touch normal people, and if he's in a good mood, he'd let bad guys live, though all in all he doesn't really care whether they live or die. He tells Accelerator that they are the same as in their battle he asks him how many bystanders got hurt by their attacks. Accelerator says that including the person (Uiharu Kazari) that shielded Last Order, they are all the same, and that Kakine, someone who kills bystanders has no right to lecture him, and that Kakine is not exempt from his own ideals. As Kakine doesn't believe this, Accelerator shows to him why he is #2 and he is #1, why there is an impassable wall between them. Here Kakine discovers, much to his disbelief, that despite the destruction caused by their battle, no bystander was hurt due to the efforts of Accelerator, everything was under his control from the beginning of the battle. Here Accelerator tells him that what he is what should be called a villain.

Angered by Accelerator, Kakine increased the power of his six wings and prepared to do battle once more, confident that he has no way to defend himself as he knew about his filtering system, though Accelerator is unintimidated. Accelerator admits on how his Dark Matter can work against his reflection, to which he tells Kakine that all he needs to do is add Dark Matter into his calculations, using his ability to control Dark Matter. Kakine laughs at this prospect. After a couple of banters, the two clashed once again.

Accelerator defeats Kakine Teitoku, taking control of his white wings and stabbing him with it. Though terribly injured, Kakine still lives. As Accelerator was not one of those "good guys" and since Kakine willingly involved civilians and Last Order, he prepares to execute the unconscious Kakine with this. Yomikawa Aiho appears before Accelerator and begs him to put down his gun and spare Kakine. Accelerator points a gun towards Aiho, as even though she was one of the "good guys" she impeded in what Accelerator believes to be his "path of evil". Accelerator hesitates, to which Aiho says that he can't do it, as he hasn't "rotted" that much. With Accelerator unable to fire, she slowly takes the gun from Accelerator's grasp and took away its ammunition.

As Accelerator stared blankly after what had happened, he suddenly hears something: Kakine Teitoku has stabbed Aiho. Accelerator is in shock as Kakine restores his white wings and mocks Aiho's words to Accelerator. Afterwards Kakine rants on about the darkness and on how the both of them are still the same, unable to protect anybody, and will continue on killing. Kakine stands up and uses his powers to step upon Aiho. Accelerator begs to stop, but Kakine continues to torture Aiho, wanting him to push him to the edge, wanting him to be as low as him, mocking him for becoming soft. And thus, Kakine shatters the pillar that supported Accelerator.

Seeing the black wings, Kakine deemed to be made from Dark Matter. Impressed by its power, Kakine that Dark Matter is only suitable as a spare plan, though he says that it doesn't meant it's all decided. With that his wings spread out and glowed, Accelerator and Dark Matter, black wings and white wings, the organic and inorganic, the One Who Wields the Power of God and the One Who has Touched the Territory of God, face to face. Then an unprecedented power expanded within Kakine, perfectly mastered his power. Kakine laughs at the implications of what would happen now, as he waved his completely awakened six wings down at Accelerator. As he tries to test his new powers on Accelerator after seeing him as no longer a threat. Immediately after Kakine is splattered onto the asphalt and his right hand torn from the shoulder. Despite his injuries, Kakine is too shocked to take in what happened, believing he was untouchable and believing that Accelerator changing vectors and energies of some sort to redirect it towards him as an attack was impossible. Torn apart and unable to do anything, Accelerator walks toward Kakine and slaughters him.

Accelerator continues to go on a rampage with his black wings, forcing Anti-Skill to respond. Luckily, Aiho was able to survive, and tries to stop Accelerator after she comes to. However, she is stopped by Saigou Ryouta, who tells a great distortion is taking place with regards to the AIM Diffusion Fields. She breaks from Ryouta's grasp, only to discover several armored Anti-Skills and armored vehicles. Aiho demands them to put their guns down, and tells that it is their duty to protect Accelerator. Aiho tries to come close to Accelerator, though because she is injured, blood spurts from her mouth, and is restrained by Ryouta. However, their last hope, Last Order, appears, coming out of the crowd at great speed towards Accelerator.

As his black wings continued its rampage, Last Order approaches, and says that she has finally found him. However, Accelerator tries to attack, and though everyone flinches believing that Last Order has fallen to her demise, the black wings stop before Last Order. But Last Order is undeterred as it shows that Accelerator is still has control. An Anti-Skill opens fire without permission while Accelerator is distracted, responding to this his black wings try to attack, only for Last Order to plead him to stop, and he does. Last Order holds out her arms and says that all is all right now and there is no need to do what he is doing. As if to blow apart those words, the black wings try to again but once again stops before her, his conflicted heart consuming his action. He continues to scream in turmoil, and finally he roars and the sounds of the black wings wave once more. They try to attack the unperturbed Last Order, all of which miss its mark. And then it swelled up greater than it has ever been and tried to strike down Last Order again. It reached in front of Last Order, Accelerator's movements have stopped. With his head lowered, the black wings disappear and Accelerator falls, all of his strength leaving his body. Last Order catches Accelerator with arms wide open, and held him with all the strength she could muster. With that Last Order whispers to Accelerator's ear of her relief. Finally the lost child is found.

After Accelerator's triumphant battle against Kakine, the liaison calls him to remind him of the gravity of his actions in the battle. He tells him that he was the one who gave him the information regarding Kakine in the first place and as such won't be too hard on him. Accelerator asks him what his penalty is, though the liaison wonders as both increasing his debt and killing him just is inappropriate, his tone irritating Accelerator. Then the liaison asks an unexpected question, asking him if he has not given up on coming back to the "warmth" after falling that far and declaring that he will stand at the very top of the darkness. Accelerator answers that he still hasn't and asks him if he is going to stop him. The liaison answers that he will give them right to struggle, though he cannot guarantee him that he has the right to grant him that. Accelerator, satisfied with his answer hangs up on him, swearing that he will outwit the darkness.

At some unknown point in time later in an unknown location, Accelerator, Tsuchimikado Motoharu, Unabara Mitsuki (Etzali), and Musujime Awaki gathered together. Motoharu shows the Tweezers that he had recovered from the confusion after Accelerator's fight with Kakine, shocking him that he was hiding among the onlookers. Motoharu references on how SCHOOL was able to collect a nanodevice known as UNDER\_LINE and store it inside the Tweezers in order to examine it. Accelerator becomes suspicious on how much Motoharu, and realizes that he may have been taking secret actions of his own. Motoharu shows to them the information inside the UNDER\_LINE, the core of Aleister's direct communications network. Seeing that it was all a bunch of information they were able to get on their own, and that it was just information the higher-ups are gathering to keep an eye GROUP's actions, they become dismissive of it. However, Motoharu reveals that there is one more, and says the last one the list of information displayed on the Tweezers’ screen is the word DRAGON. After all that fighting, they made at least one little discovery, a key that they could potentially use.

#### DRAGON Arc

*Main article: DRAGON Arc*
After the aftermath of the events in Volume 15, he is hired along with the other members of GROUP to take on a rogue group called "Spark Signal" in Academy City. After Accelerator wipes out their main force, they find info on DRAGON, a mysterious force. When Accelerator tried to get close to the 5 remaining members of Spark Signal to gain information on DRAGON, the bodyguard of Director Shiokishi killed the remaining members and told Accelerator to stay out of Shiokishi's businesses if he doesn't want to regret it.

He runs into Takitsubo Rikou lying in a bad state when Hamazura Shiage, who misunderstands Accelerator's intentions, arrives. Shiage tries to fight him but doesn't stand a chance, yet Accelerator leaves them both after watching how determined Shiage was and because Rikou caused him to feel compassion.

After he left the place, GROUP negotiated with Director Oyafune to help Accelerator take down another director that was after GROUP. When Shiokishi was defeated, he remarks he 'unfortunately' does know the truth about DRAGON, and it might have been better if he didn’t know in the first place. When GROUP asked him what DRAGON was, he replied “DRAGON is everywhere" and then everyone else, including GROUP, except for Accelerator, got knocked unconscious. Before losing consciousness as well due to blood lost, Shiokishi exclaimed the one behind them that did this wasn’t Fuse Kazakiri like Accelerator thought after Etzali's comment about DRAGON could be used as a meaning for an "angel".

In front of Accelerator appears Aiwass, a higher dimensional super-being, the true author of the Book of Law and Crowley's mentor summoned to the physical plane of existence by Aleister himself. Aiwass keeps Accelerator conscious out of curiosity. Aiwass then explains that when AIM entities like itself are manifested, Last Order is heavily strained and may die/collapse if left untreated. Accelerator finally got provoked and tries to strike down Aiwass, but he suddenly receives a heavy wound on his upper body when charging in. It turns out Crowley had embedded an auto defense into Aiwass's appearance to prevent suicide. Accelerator then lost completely to Aiwass even after unleashing his Black Wing. However, in the end he used his cane to block the Misaka Network, thus making Aiwass to be slowly disintegrated. He then pulled out his gun and shot the core in its head.

Unfortunately, Aiwass was unscathed and Accelerator laid on the floor bloody and unable to move. As he struggled, Aiwass praised his attempt, said that would have taken it out if it were on the same level as Fuse Kazakiri. An angel's halo then appeared above its head and Aiwass said "It seems I can transform," before knocking Accelerator unconscious.

Taking Last Order with him and hiding themselves in a freight train, Accelerator headed to Russia, specifically toward the Elizalina Alliance of Independent Nations, after Aiwass suggested not even Heaven Canceller could heal Last Order this time. Aiwass said him that he could find a completely different set of laws that he has never seen before there and to remember the term "Index Librorum Prohibitorum", because, though that itself was not actually there, important item dealing with it was. Accelerator crushed his cellphone, erasing his last link to Yomikawa Aiho, Yoshikawa Kikyou, GROUP and then began his search for a means to save Last Order in Russia.

#### World War III Arc

*Main article: World War III Arc*
While riding a train carrying military supplies to Russia, Accelerator spends a few moments talking to a barely conscious Last Order. This conversation is cut short when 10 unmanned Powered Suits attack the train, Accelerator covers Last Order's eyes with a handkerchief before engaging them. It seems the goal of the machine soldiers wasn't Accelerator or Last Order, but various parchments with spells on them. Accelerator easily annihilates the forces Academy City sent troops for and then studies the parchment.

As of Volume 20, he is currently in Russia, where he has a brief encounter with some Russian mages, and some of Academy city's new streamlined, and high-speed Powered Suits. It is also during this encounter where we learn that his ability not only works on magic (although incompletely, as the magic is dissipated instead of redirected) but also on teleportation as well.

Accelerator also has an encounter with one of the new Level 4 Misaka clones, dubbed Misaka Worst, where he learns of Crowley's plans to make a new network with the new line of clones, and eliminate Last Order who has now become obsolete. Despite being far more powerful than the clone, he is at a disadvantage since he cannot bring himself to hurt another clone after the Level 6 experiment, and sustains minor injuries. Misaka Worst then proceeds to taunt and mentally traumatize him, telling him about the Sisters' hatred of him, and how Last Order's emotions for him are false. She ultimately forces Accelerator to choose between protecting Last Order and upholding his vow to never hurt another Misaka clone.

This causes Accelerator to have a mental breakdown, losing all reason when he awakens and goes berserk. He proceeds to beat Misaka Worst into the ground, becoming even more cruel and barbaric than his old personality from the days of the experiment. Despite having lost all faith in humanity, he still saves her when she attempts suicide as a way of showing the scientists who doubted him, that he does have the capacity to save people (alternatively, he only did it to annoy the ones who thought up this plan, telling them they've failed in their calculations). He then continues his rampage in front of an injured Misaka Worst, who notes that being around by him and seeing this state causes her to feel a lot of fear and regret for pushing him too far.

Later, he sees Kamijou Touma passing in a military convoy along with Elizalina's forces. Accelerator, enraged that the supposedly "invincible hero" is not willing to help Last Order in her time of need, attacks him out of the blue. He starts by causing a massive explosion that knocks down Touma, who miraculously survives. Accelerator then realizes that frequent battles must have given Touma some kind of supernatural instinct, an incomplete form of precognition for sensing AIM fields in some way, and thus reacting to the minute movements of his opponents.

Touma then proceeds to get up and exchange words with Accelerator, showing that Accelerator both idolizes and is jealous of Touma and his heroic personality because he cannot attain such a personality himself. Touma rebuts Accelerator's hero-villain ideals, stating that heroes are not necessary and telling Accelerator to realize that choosing good and evil and being heroes and villains are all unimportant - what really matters is the desire to protect someone.

Accelerator then summons 100 wings and strikes Touma with them, only for Touma to use his Imagine Breaker to grab one of his empowered wings and throw Accelerator off-balance. Touma then proceeds to punch Accelerator in the face, knocking him down. The second defeat at the hands of Touma triggers another big change in Accelerator's mentality, as Touma shattered Accelerator's ideals and the power of the black wings that he gained by submitting himself to the dark side. Accelerator's villainous rationale that had been his pillar of support was "killed" by Touma.

Touma also uses his Imagine Breaker to stabilize Last Order, although it was only a temporary fix, and then leaves him a note informing him to look for "Index Librorum Prohibitorum" to inquire about the lambskin Touma saw Accelerator had, though Accelerator mistook it for a note telling him to look for Index if he wants to save Last Order, since he heard about Index from Aiwass. Accelerator is later seen in a convoy traveling along with Elizalina's troops searching for a way to heal Last Order.

He currently has possession of a lambskin document sought after by Academy City, and may turn the tide of the war. He acquired it from a Russian military convoy he was hiding in, and when Academy City forces attacked, he thought they came after him while it was for the lambskin document. Accelerator then took the report, thinking of using it as a bargaining chip for Last Order's safety - if Academy City wants it so badly they would mobilize the same forces they'd use to fight a Level 5 esper, then it should be useful.

In Volume 21 the lambskin is revealed to be the last piece for Fiamma of the Right to fill the gap between Index's knowledge of all magic and allow him to access magic of Divine origins. Because of this, Gabriel attacks him and he is forced to defend himself. He and Fuse Kazakiri, after initially fighting each other, were able to defeat Gabriel due to the combined efforts of Acqua of the Back and Kamijou Touma; taking away 50% of Gabriel's power and removing Gabriel from Fiamma's control respectively.

To save Last Order, he and Misaka Worst analyzed Index's song that was stored on the Misaka Network, using his vector abilities to understand it and perform the spell. He was severely damaged by it, but completely cured Last Order. Soon after, Fiamma blasted a huge amount of telesma from the Star of Bethlehem as a last ditch effort to complete his goals. Sensing the attack coming, Accelerator fully "awakens," changing his wings from black to white and gaining a halo over his head. After saying goodbye to the recently cured Last Order, he went to intercept the telesma. He succeeds, and was later picked up by an Academy City retrieval unit. After the retrieval, he forcefully negotiates with Academy City to free everyone from the darkness.