Airi Otogawa/History & Synopsis

## History

Airi's parents own a restaurant and she also has two younger siblings. She attended Sekirei Girls' Academy in the past, and was ridiculed for her fins and Quirk, as most of the girls at Sekirei were Quirkless due to it being a private school and the first people to attend being Quirkless too. As a result, Airi became cold and isolated, and stayed that way until her graduation. The day after her graduation, she met Katsuki Bakugo in a convenience store, who was yelling at the shop owner.

She insulted him as a joke, and Katsuki took it too seriously, to the point where Katsuki nearly used his Quirk on her. The two were kicked out of the store as a result and Airi smiled at Katsuki before running away from him.

Eventually, Airi got a recommendation from U.A. High School and came 3rd in the practical part of the test.

## Synopsis

### Quirk Apprehension Test Arc

Having gained entry to U.A. High School, Airi attends the first day of school with Class 1-A. Their homeroom teacher Shota Aizawa immediately brings the class to the training field for a Quirk Apprehension Test and claims that whoever comes in last will be expelled.

Airi manages to score third place in the entire class while Izuku Midoriya comes in last, which makes Airi tease him light-heartedly. Shota then reveals that he was lying about expelling the last-place student to make sure the students did their best. Airi yells at their teacher angrily.

### Battle Trial Arc

Airi is teamed with Hanta Sero as "Team J" after being randomly drawn, participating as the Hero team. It is unknown how they did in the trial.

### U.S.J. Arc

During their next homeroom class, Shota Aizawa announces Class 1-A must choose a class president. Airi and his classmates are excited by the idea of representing their class. After voting, Izuku Midoriya is elected and Airi openly supports him.

Later on, the school sirens go off at lunch and students evacuate in a panic, creating a large traffic jam. Airi is caught in the mob, trying to stop it, but the situation is diffused by Tenya Ida, who reveals it is a false alarm caused by the media trespassing on school grounds. Afterward, Izuku resigns as class president and nominates Tenya in his place. Airi supports the decision because she saw that Tenya took charge of the previous situation in a smart and quick way.

Shota interrupts and instructs the class to suit up and prepare to head out for rescue training. While on the bus traveling to an outside facility, Airi speaks with her classmates regarding Quirk's and their relation to pro heroes popularity. She says that she wishes for a stronger Quirk, believing it would garner her more fame. Eijiro and Izuku argues that Airi's Quirk is strong enough for her to become a popular pro, and Airi takes this chance to take a jab at Katsuki Bakugo, who yells angrily at her. The two bicker for the rest of the bus ride to the U.S.J.

The class eventually arrives at the Unforeseen Simulation Joint, greeted by Thirteen. However, they are interrupted by the arrival of the League of Villains, lead by Tomura Shigaraki. As the villains keep showing up one after another, Airi is seen evacuating with her class, but they end up coming across Kurogiri, who blocks their way. Airi, together with Katsuki and Eijiro, attempt to attack the villain, but are unsuccessful due to Kurogiri's amorphous body. The villain then uses his Quirk and warps Airi, along with Katsuki and Eijiro, to the Ruins Zone of the U.S.J.

In the Ruins Zone, Airi, Eijiro and Katsuki are ambushed by a group of villains, but they are both able to hold their own and easily defeat them. When EIjiro Eijiro says that they should go and save the others, she assures him they'll be fine. Katsuki, however, decides to go and fight Kurogiri instead, much to Airi's amusement and Eijiro's surprise. After hearing Katsuki's reasoning to go after Kurogiri, the two notice Katsuki's calm attitude, much to Katsuki's chagrin. They decide to go with Katsuki.

The three eventually reach the central plaza, where they attack Tomura and Kurogiri respectively. Eijiro attempts to punch Tomura, but the latter evades him, which makes Airi try to attack him. Airi expresses her desire to support All Might, but the hero refuses and tells them to escape instead. Tomura attempts to attack Airi and the others, but All Might's fight with Nomu prevents him from getting close. Airi and the others watch in awe of All Might's strength as the Number One Hero defeats the Nomu.

Airi withdraws herself from the rest of the fight, but witnesses Izuku rushing to All Might's side. Izuku and All Might are both saved when Tenya returns to the U.S.J. with pro heroes as reinforcements. After the remaining villains are defeated, Airi rushes to check on Izuku's condition. Cementoss arrives and blocks Airi's way, before she discovers All Might's weak form, which she finds suspicious.

He instructs Airi to regroup with her class. Airi follows the hero's instructions and joins her class outside the facility before returning to school.

### U.A. Sports Festival Arc

Two days after the attack on the U.S.J., Airi and his classmates return to school discuss the attack. Airi mentions that All Might was so brave and cool. After Shota Aizawa returns to class, the class gets lectured about the importance of the upcoming U.A. Sports Festival. After class, Airi yells that she's excited about the festival because the students only get a few chances at it. Airi is also amongst those who are freaked out when Ochaco Uraraka gets overly excited (although she openly supports her, jumping up and down, pumping her fists in the air) and demands the class chant that they will do their best in the festival.

At the end of the day, Class 1-A's exit gets blocked by a crowd of students from other classes. Katsuki confronts and insults the crowd, making enemies out of everyone else before leaving. Eijiro tries to get Katsuki to defend the class, but he replies that the crowd of students are irrelevant and it's only important that he defeats them. Airi tells Katsuki to cool his temper and the two start to argue again.

For the next two weeks before the festival, Airi trains at an unnamed river. She constantly transforms and untransforms, out of and in the water, as well as swimming without melting into the water. When the day of the U.A. Sports Festival arrives, Airi changes into her P.E. clothes and prepares with her class in their designated waiting room.

Chief referee of the Sports Festival: Midnight announces the preliminaries will be an Obstacle Race four kilometers around the stadium, which immediately begins after the rules are explained. Airi eventually reaches the first obstacle: a blockade of Villain-bots from the entrance exam, including several giant Zero-Point Villains.

Airi is one of the first to clear the obstacle by slipping under them using her Quirk, neck and neck with Katsuki. Airi crosses the finish line in 4th place, qualifying her to participate in the Cavalry Battle.

Izuku Midoriya convinces Airi to join his team for the Cavalry Battle. The former explains that Airi's roles will be to defend the team and attack the other teams with her Quirk and natural strength, as well as tactical intellect. Airi laughs loudly and tells Izuku that she thinks that he thinks she's the best, making the rest of her teammates confused.

The second round of the festival begins, and along with Ochaco Uraraka and Mei Hatsume, it's up to Airi to help Izuku protect their ten million points.

As soon as the round begins, Team Tetsutetsu attacks and traps Team Midoriya using Juzo Honenuki's Quirk. Thanks to gadgets Mei provided the team with, Airi and company are able to escape by flying through the air. Kyoka Jiro tries to attack their blind spot, but Airi repels it by transforming her hand into water for a split second and deflecting the attack. Izuku comments on Airi's powerful Quirk and how perfectly it suits the team just before they land safely using Ochaco's power.

They are given few seconds of safety, as Team Mineta immobilizes them momentarily using one of Minoru's spheres. Then Team Tetsutetsu joins the fray and charges for Airi's party.

Outnumbered, Airi reminds Izuku that it is unwise to get trapped between two teams. Izuku breaks one of the hover soles used to maneuver through the air in order to escape and Katsuki confronts them in mid-air. He nearly blasts Izuku, but Airi is able to block the explosion using water, which makes Katsuki frustrated, calling her flimsy. They are forced to land, and are almost instantly confronted by Team Todoroki.

Airi believed this confrontation wouldn't happen until later in the contest and comments that Shoto must have it out for Izuku. Various teams close in on them, but Team Todoroki's Denki Kaminari shocks them all using his Indiscriminate Shock technique. Airi is able to defend the team from the electricity using a shield of water, leaving the others to carry Izuku on their own for a while, but Team Todoroki continues to pursue them. Airi tries to strike Shoto, but Momo Yaoyorozu creates a strong enough shield to block her attack. Izuku comments that Momo's Quirk is too powerful, but Airi replies that Denki is the one to fear and if there were any more electricity she would suffer, since water is a conductive element.

Izuku invokes a strategy that keeps Team Todoroki at bay for the latter half of the games, but their points are ultimately stolen after Tenya uses his Recipro Burst technique. Airi stares at Team Todoroki, alarmed by Tenya's lightning speed, and suggests to Izuku that their team try for other points. Izuku refuses and with encouragement from Ochaco, they decide to charge at Team Todoroki to reclaim their points. Izuku is able to grab one of their headbands, but it turns out not to be the one worth ten million points.

Without enough points to move onto the next round, Team Midoriya makes one final attempt. Airi sends a blast of water to attack, but Denki repels it with electricity. Katsuki arrives on the scene, but time runs out just as everyone is about to clash.

Izuku tries to apologize for the loss, but Airi interjects. She reveals that she tried for the ten million points, but was unable to grab it. Instead, thanks to Izuku's attack, she was able to steal the headband around Shoto's head by sending a jet of water and storing a headband in the puddle of water. She revealed that any water she produces will come back to her. The headband is worth is enough to place Team Midoriya in fourth, allowing them to advance to the finals.

Midnight announces the finals will be a One on One Fighting Tournament and everyone draws lots to see who they will face in the first bracket. Airi matches up with Momo, and she promises her to not go easy on her at all. Before the tournament begins, participants are given the option to participate in recreational games. Airi is not seen.

Airi faces Momo in the sixth contest in the first bracket of the tournament. As soon as their duel begins, Airi almost instantly turns into water and spreads around, before appearing behind Momo and pulling her backwards into the out of bounds area, ending the match quickly. After her match, Airi sits next to Katsuki and Denki before the match between Izuku and Shoto begins. After Ochaco's defeat at the hands of Katsuki, Airi reassures her that she did her best, and that she was very impressed.

Once the second round begins, Airi faces Mina for her next match. Airi easily defeats Mina by pushing her out of bounds while using the same strategy and moves on to the semi-finals.

Airi's third opponent is Katsuki, whose explosions put her at a disadvantage since her water will turn into steam due to heat. She is forced completely on the defensive because of the heat generated from Katsuki's Quirk, while hiding. She mulls over Katsuki's brutality and admits she has underestimated his opponent, but still taunts him. After Katsuki blasts her in midair while in her water form, she transforms back into a physical state and kicks him in the face.

However, Katsuki evades and gets behind Airi before activating his stun grenade technique. This move engulfs the arena in heat and allows Katsuki to capitalize and pin Airi down by her face. Airi taunts him and asks if Katsuki knew her weakness all along, to which Katsuki replies he figured out by attacking relentlessly. Katsuki admits it was an unfair matchup, but declares that Airi is finished, and so Airi surrenders, smirking at him.

Once Katsuki defeats Shoto in the finals, the Sports Festival concludes and Airi is awarded third place along with Tenya. Airi takes the podium, sharing it with a very angry Katsuki, who had to be restrained after the final match. Airi laughs at him, telling him to cool his temper again. He is only able to glare at her and yell incoherently.

All Might arrives to hand out the awards, and gives Airi the bronze medal first. He advises Airi to train harder so that he can face different opponents without relying so heavily on her Quirk. Airi smiles and thanks the number one hero, a complete 180 degree turn from her usual defiant disposition, and promises to do so. In the aftermath of the festival, Airi and the rest of Class 1-A are granted the next two days off from school to recover, but Airi spends this time with her younger siblings, going out to the zoo with them on the first day and the aquarium on the second day.

### Vs. Hero Killer Arc

Class resumes in U.A. two days after the Sports Festival. Airi joins her class in learning about Hero Informatics during homeroom. Shota reveals the Pro-Hero draft results, with Airi receiving 2,791 from pros, shocking her classmates when she mentions one of them was from Edgeshot, who contacted her personally after the Sports Festival. Midnight joins the class to help the students choose their hero names. Airi chooses the name "Mizutamari", linking it to the Japanese word for "puddle" but in katakana, and her siblings' names combined. The students are given personalized lists of hero agencies they are to choose from along with their nominations. When the internship week arrives, Airi and her class meet at the train station.

Airi chooses Storm's Hero Office to intern at. She greets him warmly, and he congratulates her on her performance at the Sports Festival. She laughs and thanks him, asking what she's gonna do now. Airi is taken to a back alley, where she faces villains that are buying illegal drugs. She manages to defeat them alongside Storm, and he mentions that she has the potential to be an excellent Hero, possibly even the No. 1 Hero. She thanks him gratefully.

Airi returns to school following the conclusion of her internship. When Izuku, Shoto, and Tenya's run-in with the Hero Killer is brought up during class, Airi mentions that she was worried about them, but Shoto doesn't believe her because she is smiling mischievously throughout it, which she denies, saying that's her resting face. She attends Basic Hero Training with her class afterward where the class participates in a rescue training race. Later, she meets Katsuki and can't stop hysterically laughing and making fun of his new haircut alongside Kirishima and Sero. Embarrassed, Katsuki demands that they stop, telling them that his hair had gotten used to its new style and he couldn't get it to return to its previous style. Katsuki threatens them, but they just continue laughing, telling them that they'd like to see him try and calling him "pretty boy". This nickname causes Katsuki to lash out at them in anger and his hair returns to normal, making Airi laugh harder.

During Basic Hero Training, Airi tells Katsuki to shut up and hits him when he insults Izuku, saying that he doesn't know what Izuku has done during his internship.

After class, she joins her female peers inside the girl's locker room. Minoru tries to peep on them using a hole in the wall but Kyoka stops them. Airi shouts at Mineta through the hole, saying that he's a disgusting pervert and that she'll beat him up the next time she sees him, making him shudder in fear. She thanks Kyoka for stopping him and says they need to plug the hole immediately.

### Final Exams Arc

One week prior to Final Exams, Eijiro notes that Momo is being virtuous in her studies and suggests that he may join her. Airi who came in third (tied with Katsuki) in mid-term grades, tells Katsuki to calm down when he suggests a violent way of studying, but laughs when Eijiro states he's counting on it. After lunch, Airi overhears Denki and Mina talking about how the practical portion of the finals consists of fighting robotic villains. Airi reassures them, telling them not to be scared and dragging an angered Katsuki away, telling him to shut up.

In the days leading up to final exams, Airi, alongside Katsuki, helps Eijiro study. After completing the written portion of the exams, Airi and her class meet at the training grounds in their costumes for the practical portion. There, Class 1-A meets with the teachers and Principal Nezu explains that the practical has been changed from fighting robotic villains to being paired together and facing off with one of the teachers.

--WIP--

### Forest Training Camp Arc

Summer break begins and Class 1-A rides a bus to a forest reserve belonging to the hero team: Wild, Wild Pussycats. Pixie-Bob and Mandalay introduce themselves and challenge the students to reach base camp past the forest in three hours. When most of Airi's peers refuse, she and her class are forcibly thrown into Beast's Forest by Pixie-Bob's Quirk.

A monster created from dirt clods immediately attacks Airi when she gets separated from the others, and she rips it apart by using the moisture in the dirt. Sje soon finds her classmates, and Class 1-A works together to fight their way through Beast's Forest. They encounter several different dirt monsters.

Class 1-A doesn't arrive at basecamp for several more hours. Well over their time limit, Class 1-A arrives at the base camp exhausted and battered. Mandalay reveals the time limit was the expectancy for actual heroes, not the students. Mandalay's nephew Kota, punches Izuku in his groin. Katsuki says the boy is precious, and Airi quips that he could be a distant relative. This angers Katsuki and he threatens Airi until Shota breaks it up. The Pussycats serve the students dinner and Airi joins her female classmates in the baths.

Training begins the next day. Shota makes an example out of Katsuki by having him throw the ball like he did during the fitness tests. Katsuki expects to toss the ball over a kilometer but only throws it four meters farther, and Airi starts laughing at him. Shota explains that while the students have gotten stronger, their Quirks have not. Airi trains by turning parts of her body from water and back into a physical form, lengthening the amount of time she can stay that way. On the evening of the third day, Airi ends up paired with Momo for the test of courage. She tries to make Shoto switch partners with her so she could get a glimpse of Katsuki getting scared, but Shoto refuses. Class 1-A students roam the forest while Class 1-B students try to scare them. Their fun event is interrupted by the arrival of the League of Villains' Vanguard Action Squad. The forest is filled with poison gas. Momo creates gas masks and rushes through the forest, handing them out to all the students. Airi and Momo join up with Yosetsu so he can guide them to the students in Class 1-B. Momo leaves Yuga behind to watch over Kyoka and Toru, who have both been poisoned, while Airi runs off, making the others confused.

Mandalay sends a telepathic message to all the students giving them permission to engage in combat. She also informs everyone that Katsuki is one of the villain's targets, making Airi run harder. Airi sees Katsuki ignore Mandalay's warning and rush to attack Moonfish, making her shout at him in rage. Moonfish nearly stabs Katsuki with his Quirk enhanced teeth blades, but Airi pulls him back just in time and Shoto blocks any other blades from coming by using his ice.

Airi yells at Katsuki not to attack carelessly and get to safety. Irritated, Katsuki mentions that he gets the feeling Izuku is involved in Mandalay's sudden change of heart before Airi slaps him. Moonfish nearly stabs them again, but they evade. Shoto repels him using ice and the villain moves through the treetops using his Quirk. Shoto sternly tells Katsuki not to start fires because they could ignite the forest and kill their own classmates.

Airi runs off somewhere again but is confronted by Mr. Compress, who tells her he saw her performance at the Sports Festival. It is implied she was captured by him.

The Bakugo Escort Team eventually reach Ochaco and Tsuyu fighting off Himiko Toga. Izuku recruits them to their mission. The girls question why Katsuki and Airi aren't present, forcing the team to realize that Airi, Katsuki and Fumikage are missing. Mr. Compress makes his presence known and explains that he took Airi with his magic because she'll shine brighter on the villain's side.

Izuku, Katsuki, Shoto, Ochaco and Tsuyu chase Mr. Compress until the boys are able to tackle him out of the air. They stop him at the villains rendezvous point and a battle ensues to decide the fate of Airi, Katsuki and Fumikage.

The team is able to rescue Airi, Fumikage, but Katsuki is ultimately captured by the Vanguard Action Squad. As his body is reverted from Mr. Compress' Quirk, Katsuki is dragged by his neck by Dabi into Kurogiri's portal. Airi yells at the villains and reaches for him, but misses by a hair.

### Hideout Raid Arc

Two days afterwards, Airi visits Izuku in hospital along the rest Class 1-A, unusually dejected. She hears Eijiro and Shoto's plan to rescue Katsuki, and they ask Deku to join them on that mission, despite Ida's objections, who demands that the rescue of Katsuki be left to the Pro Heroes. Tsuyu Asui understands that everyone is distressed and asks Izuku, Shoto and Eijiro to be levelheaded saying that if they act based on their feelings and break the rules, then their actions will make them as bad as the villains, regardless of how noble their intentions are. However, Airi says it would be better for them to save Katsuki themselves, since the Pro Heroes could be busy holding back villains.

The next day later that night, Airi, along Eijiro and Shoto, wait for Izuku and Momo. Izuku and Momo arrive but before Airi can speak, Tenya appears. He is angry that they are about to repeat the same mistake he made at Hosu. Despite Izuku knowing that breaking the rules is against the law, Tenya punches Izuku in the face, which makes Airi smile and Shoto asks why she is smiling. She simply replies that it reminds her of Katsuki. Tenya is angry and frustrated that they are not taking his concerns, feelings and worry into consideration; Tenya says that he doesn't want to see Izuku or any of them land up with severe injuries.

Airi tells Tenya that they will not engage the villains in combat while Eijiro states that their rescue will be covert. Momo states that she came along to accompany them all in order to prevent them from engaging in combat. Izuku tells Tenya that after failing to save Katsuki at the training camp, his gut feeling is telling him that he must save Katsuki. Tenya sees that they are determined and resolute and is cheered up by the fact that they won't engage in combat; Tenya decides to go with them.

Airi along with Momo, Izuku, Eijiro, Tenya and Shoto travel by train to the city where Momo's tracking device detects the villain with her button beacon. After putting on disguises, they head towards the League of Villains' hideout. They continue towards the place that Momo's tracking device is detecting. After waiting for a while near the place, Airi notes that the villains have made no movements and states the possibility of Katsuki not being in the place while Tenya reminds them that if he sees any combat, then he will not hesitate to stop them, causing Airi to tell him to calm down and have some fun.

Afterwards, Airi, Momo, Tenya, Shoto, Eijiro, and Izuku prepare to infiltrate the supposed League of Villains' hideout. The group go to the back of the hideout and see a window. Airi and Momo act as recons while Izuku and Eijiro see what is inside with the night-vision goggles Eijiro brought along. Suddenly, Mount Lady destroys the front of the warehouse which shocks Airi. Seeing that the Pro Heroes are at the warehouse, Airi and the group assume that All Might is with Katsuki as they are speaking and decide to head home.

Suddenly, the entire warehouse is completely destroyed by a man along with the surrounding area being significantly damaged. She was paralyzed by fear due to All For One's overwhelming presence and is unable to move. As the battle between All Might, All For One, Katsuki and the League of Villains continue, Izuku comes up with an idea and explains his plan to Airi and the group. She watches as Izuku, Eijiro, and Tenya enact the plan Izuku came up with, which allows them to rescue Katsuki. Seeing that Izuku, Eijiro, and Tenya have succeeded in rescuing Katsuki, Shoto, Momo and Airi begin escaping from the battlefield. Airi happily yells to Katsuki that she missed him and calls him an idiot, and he angrily yells at her to shut up.

Shoto later phones Izuku and finds out that him and his group are at the train station. After All Might defeats All For One, Airi, Momo and Shoto meet up with Izuku and his group. They take Katsuki to a Police Station for his safety. Afterwards, Airi goes home.

### Provisional Hero License Exam Arc

Following Katsuki's rescue and the retirement of All Might, Nezu transformed U.A. into a boarding school in order to protect the students. The Heights Alliance was built in just three days. Shota Aizawa meets with his students outside of the building. He states they must start preparing to get provisional hero licenses like they had planned to during the training camp.

Then, Shota scolds Airi, Izuku, Tenya, Momo, Eijiro, and Shoto. He knows that they were present at the site of Katsuki's rescue and took it upon themselves to rescue him. He also knows that the rest of Class 1-A, except Katsuki, Toru, and Kyoka, also knew about their plans but did nothing to persuade them. He further more says he would have expelled everyone but Katsuki, Toru, and Kyoka from the school, if it weren't for All Might's sudden retirement. Shota advises the group that went to save Katsuki to go through the proper procedures next time which will also restore the trust between them.

Class 1-A arrange their luggage in their respective bedrooms. The girls talk the guys into a refreshingly lively competition to see whose dorm is the best among the rest and will be crowned the "Room King". When they enter Airi's room, which is dark and looks like a typical gamer's room, the girls say they should've expected this, hurting Airi's feelings

After the competition, at Ochaco's urgings, Airi along with Izuku, Shoto, Tenya, Momo, and Eijiro all meet outside the dorm where they find her with Tsuyu. Tsuyu apologizes for harshly doubting their plan to save Katsuki, as they apologize for worrying her and they manage mend their friendship.

The next day, Class 1-A begin their school life anew. In Class 1-A's room, Shota Aizawa mentions that their first objective will be earning their Provisional Hero Licenses. To prepare for the Provincial Hero License exam, Class 1-A students will create at least two signature Ultimate Moves that they will use in combat, with his help and that of Cementoss, Ectoplasm, and Midnight. He also recommends them to upgrade their hero costumes.

Airi trains by turning herself into water and back into her physical form again. She has changed her Hero costume to something less revealing, much to Denki and Mineta's disappointment.

After a few days of training, the girls relax together in the common area and they comment on the rough training. Airi tries to get Ochaco's attention, but her mind is elsewhere. Tsuyu manages to get her attention and Ochaco reveals that her heart has been elsewhere recently. Airi believes that Ochaco is in love, much to Ochaco's shock. Ochaco denies this fact, but Airi pries further and is joined by Mina, Toru and Kyoka. When Ochaco covers her face in embarrassment, she accidentally uses her Quirk on herself, causing her to float. Tsuyu and Momo tell Mina, Toru, and Kyoka not to pry into another's love life and decide to head to bed. Suddenly, Ochaco looks at Airi and mentions the relationship between her and Bakugo, diverting everyone's attention to her. Airi smiles and tells them that Bakugo's easy to bully and Mina tells Ochaco there's no romantic chemistry between Airi and Bakugo.

The day of the licensing exam arrives and Class 1-A travels to the National Dagobah Arena, where the Hero Qualification Exam gonna take place. finally starts. There, Airi along with her classmates meets students from Shiketsu High School and Ketsubutsu Academy High School. The first part of the exam involves thinning out the number of people who can succeed by playing a game, where people put three targets on their body and are given six balls to throw at the other examinee's targets. Those whose targets have been hit are disqualified. Participants need to eliminate two students to move on to the next phase of the exam.

The room in which the students are in unfolds to reveal the arena, in which there are varying environments to battle in. As the exam starts, the rest of the schools all attack U.A. at once. Thanks to their training and costume upgrades, Class 1-A manages to avoid being hit by the balls. Yo Shindo from Ketsubutsu tells his fellow classmates that he will shatter their solid defense, and uses his Vibrate Quirk on the ground, unleashing a powerful earthquake that completely shatters the ground and causing members of class 1-A to disperse. However, Airi manages to stay, and attacks Yo. Yo counterattacks using his Quirk again, and she seems to disappear. But when she attacks again, she is thrown somewhere else.

Sumire Kagaya ambushes her using her Quirk.

--WIP--

### Shie Hassaikai Arc

The night after the exam, Izuku and Katsuki have a fight, so they are punished by Shota Aizawa. The next morning, classes resume and the rest of Class 1-A learns of Izuku and Katsuki's bout. Ochaco hopes that they made up, to which Izuku replies that their reconciliation is hard to put into words. Class 1-A leave the room to attend Nezu's opening ceremony at Ground Beta without them.

Back in the classroom, Shota Aizawa tells his class that they must switch gears back into being students. Tsuyu Asui asks him about the Hero-Work Studies Nezu mentioned in the ceremony. Shota describes the Hero Work-Studies as hero activities outside of school, saying that it is a more formalized version of the Field Training they did with pro heroes before. Ochaco expresses frustration at needing to work so hard to be recruited after the Sports Festival if they were to do Hero-Works anyway, but Shota explains further differences between the two activities. Shota tells Class 1-A that they will be expected to write about their experiences but he will explain it at a time later.

Izuku's house arrest ends after three days, and he apologizes to the whole class for the inconvenience he caused, and Airi tells him not to worry about it. Shota arrives and says that they will now go into more detail about the Hero work-studies. He brings in the top three students of the U.A., who have experience with the Hero program: Mirio Togata, Tamaki Amajiki, and Nejire Hado, also known as The Big 3. Despite being considered the top students, their personalities confuse Class 1-A, who get even more confused when Mirio Togata challenges them all to a fight.

At Gym Gamma, Mirio tells Class 1-A to attack him whenever and wherever they want. Izuku decides to go first. Airi is surprised at Izuku's determination and encourages him loudly. Izuku takes the initiative, but his kicks phase clean through Mirio's head. Using his Permeation Quirk, Mirio easily defeats more than half of the entire class 1-A. However, when Mirio attacks her, Airi turns herself into water, stunning him for a moment. However, she transforms back due to surprise and exhilaration which gives Mirio an opening to attack.

When the fight finishes, Mirio apologizes and explains how his Permeation works. He also states that the reason he wanted to fight Class 1-A is to show the experience he gained from the Hero-Work Study; Mirio was able to improve his use of his quirk to peak level and reach the top. Mirio encourages class 1-A to participate in the Hero Work-Studies as it will help them improve their career to be heroes, just as it helped him become one of the best students in the U.A. Class 1-A applauds Mirio's speech and they realize what the work-study could do for their skills.

Following this advice, she plans to do her Work-Study with Storm and contacts him. Later, at Heights Alliance, Airi listens to Ochaco grumble about not being able to work under Gunhead, with Tsuyu and Eijiro in the same situation as her, but they congratulate Izuku for being accepted in the Nighteye Agency. Shota arrives and informs that Tamaki wants to talk with Eijiro while Nejire wants the same with Ochaco and Tsuyu, and recommends them to talk to them tomorrow. Eijiro wonders why they want to talk about, and Tsuyu thinks it will be related to Work-Studies. Unable to wait until tomorrow, the three go to the third years' room to ask them. Airi wishes them good luck and talks to Katsuki.

Airi goes to do her Work Study with Storm and faces three villains on Trigger. She defeats them despite two using fire-based Quirks, posing a disadvantage towards Airi. Storm works alongside her to provide water sources.

Once done, Storm then tells her that the internship will help with their fighting skills and that she might help with "The Case". The Case is to team up with Fatgum, Ryukyu and Sir Nighteye's hero offices for an investigation.

Airi and Storm soon gather in the meeting, which brings together several heroes such as Shota Aizawa and Gran Torino; and where she meets with Izuku and Mirio, who doing their Work-Studies with Sir Nighteye, and with Eijiro and Tamaki, who doing theirs with Fat Gum, and lastly, Nejire, Ochaco and Tsuyu, working under Ryukyu. This last three had been involved a few days ago in an incident where some lowlife thugs used Quirk Erasing bullets, which is connected to the organization that is investigating Sir Nighteye, the Shie Hassaikai.

In the meeting, Airi learns that the Shie Hassaikai leader, Kai, had formed an alliance with the League of Villains. Also, he is the person responsible for the production and sale of the Quirk Erasing bullets. Thanks to Eijiro's brave actions protecting Tamaki, they were able to obtain a bullet with the contents still inside. Fat Gum explains that after examining the contents of the bullet, they discovered that inside the bullet were human blood and cells, which disturbs the U.A. students.

Sir Nighteye explains that Kai has a daughter called Eri, Izuku and Mirio encountered her on their patrol and she had a number of bandages on her. The details about her are unknown, but he deduces that Kai is probably using his daughter to make those Quirk destroying bullets, which disgusts and horrifies Airi, Ochaco, Eijiro, and Tsuyu. However, Sir Nighteye deems the bullet used on Tamaki to be a prototype that disables Quirks for a few hours and thus was distributed solely for testing purposes.

With the meeting over, Airi, Izuku, Ochaco, Eijiro, Tsuyu, Mirio, Tamaki, and Nejire are sitting at a table downstairs. Izuku and Mirio explain to the others what occurred between them and Kai. Shota spots his Class 1-A students and talks to them about originally suspending their Hero-Works since the League of Villains are involved. However, he knows that if he tries stops Izuku, he would go to rescue Eri, Airi, and the others, after knowing the situation in which Eri is, reinforce their determination to rescue the little girl. Shota gives them permission to take part in Eri's rescue operation.

For several days, students wait patiently to receive any news of Eri's whereabouts. One day, late at night, they gather after receiving a message containing information, 'on the day carry out the plan to raid Shie Hassaikai. Hours later, everyone gathers together along with several heroes at Nighteye's Agency He and his sidekicks report everybody that Eri is in the Shie Hassaikai Headquarters and that everything is ready to carry out the rescue operation. After a brief stop at the police station to gather information, the next morning At 8:30 AM, the Heroes and Police Force are outside the Shie Hassaikai's compound.

While the heroes and the police forces wait outside, suddenly, the gates smash open courtesy of Rikiya Katsukame, and begins to attack them. Ryukyu turns into a dragon and easily intercepts Rikiya's punch with her draconian claw. Ryukyu orders the Heroes from the Ryukyu Offices to deal with Rikiya and asks the other groups to move on, while she and her team deal with Rikiya. Storm nods and tells Airi to stay there.

Ryukyu's group along with Airi managed to overpower Rikiya and knock him unconscious. Ryukyu orders the Police Force to restrain Rikiya while Airi, Nejire, Ochaco, and Tsuyu prepare to head after Sir Nighteye's group. Suddenly, Ochaco and Tsuyu along with the Police Force become tired due to Rikiya inhaling their vitality, much to Ryukyu's surprise since she thought she knocked him out. Conscious, Rikiya reveals that the drug he took is kicking in which has enhanced his Quirk and now he can absorb a target's vitality simply by inhaling.

Now larger and stronger than before, Rikiya attacks the Police Force only for Ryukyu to take them to safety. 20 minutes pass and Ryukyu's group is in a standstill against the rejuvenated Rikiya. Only Nejire continues to fight against him.

Suddenly, Izuku appears and states that he called reinforcements and that their objective is underneath a nearby crossroad. With this information, Ryukyu hatches a plan, transforms into her dragon form, and charges at Rikiya. With the help of Airi, Ochaco, Tsuyu, and Nejire, she crashes Rikiya against the point indicated by Izuku, collapsing the crossroad, and causing Ryukyu's group along with Rikiya to fall down into underground, in the middle of the battle between Izuku and Kai.

Actually, the Izuku of the surface reveals to be Himiko, who used her Quirk to impersonating him. With her are Twice and a copy of Mr. Compress, whom they sent to capture Eri, but he is destroyed by Ryukyu.

Ryukyu's squad witnesses the battle between Deku and a fused Overhaul, as well as a wounded Sir Nighteye and Storm. Izuku tells Airi and Ochaco that he is leaving Sir Nighteye to them as he goes after Overhaul in an attempt to rescue Eri. After a struggle, in which Eri activates his Quirk Rewind and undoes the Overhaul's fusion. Izuku manages to rescue the girl, emerging with her to the surface through the newly created hole. Meanwhile, Overhaul uses his Quirk on Rikiya Katsukame to merge with him and, continues his fight against Deku.

The girls are worried after seeing the monstrous being that Kai transforms into after fusing. A badly injured Sir Nighteye says that Kai won't go after them but going to pursue Izuku with the intention to get Eri back. However, according to his Foresight, Kai will kill Izuku. After hearing these grim words, Airi tries to stop Ochaco as she tries to aid Izuku in his struggle against Overhaul but falls down due to her stamina being drained. Despite Sir Nighteye's prediction, Ryukyu refuses to let Kai go after Izuku.

However, Sir Nighteye convinces her that her group cannot hope to defeat the newly fused and empowered Kai. Airi refuses to stand by and do nothing. Sir Nighteye asks Airi, Ochaco and Ryukyu to help him to the surface.

After dealing with a clone of Mr. Compress, Ryukyu throws a weightless Ochako and Nighteye to the surface, and Airi watches nervously. She applauds happily when she sees that Kai has been defeated.

Kai wills himself back into consciousness and attempts to attack Izuku with his last-ditch effort to get back Eri. However, Eri's Quirk spreads near Kai, which causes his fusion with Rikiya Katsukame to become undone, returning Kai back to normal. Airi apprehends the defeated Kai.

Ryukyu reaches the surface, carrying Shota, Tsuyu, Tamaki, and Mirio with her. She asks for a report on the situation; Airi explains that they have called an ambulance for Sir Nighteye, who is in a critical condition, and Storm, who is suffering from only a hand fracture, and that Izuku has defeated Kai but something is going wrong because he is suddenly in immense pain. This is because Eri has lost control of her Quirk. A wounded Shota manages to use his Erasure on the girl to deactivate her power, saving Izuku's life.

The mission ends in success, Eri is rescued and the Shie Hassaikai dismantled. However, Sir Nighteye dies hours later in the hospital due to the injuries he suffered, and Storm is discharged. During the following days, Airi has to go through a bunch of inquiries. She felts guilty for being unable to save Sir Nighteye's life, but Storm replied that she bears no responsibility and the fault lies with the Heroes, asking her to take time and think about what she wants to do in the future. Airi replies that she wants to save people.

### Remedial Course Arc

Finally, Airi, Ochaco, Izuku, Tsuyu, and Eijiro return to Heights Alliance., Where they are received by the entire Class 1-A, glad that they are alright after what they have done, checking to make sure they are doing okay, physically and mentally, after their mission.

With the beginning of October, she and the rest of the Work Studies are allowed to go to Sir Nighteye's funeral, along with Storm, the Big Three, All Might, and Shota. Due to what happened, they are informed that the Hero Work Studies program is postponed for the moment, so she says goodbye to Storm.

### U.A. School Festival Arc

Days later, in the classroom, Shota Aizawa announces that U.A. High School will be having a School Festival and tells Class 1-A to pick out a program to perform at the festival. Tenya Ida asks ideas from Class 1-A; but they did not reach an agreement. Later at Heights Alliance, the students decide to combine several ideas and decide that their school festival program will be a live performance and dance with party space.

Airi was not able to participate in the decision-making process because, as part of the hero-work group, she was busy attending supplementary classes, but she has no problems with the idea of her classmates, being totally committed to participate in, playing bass. She also composes the melody alongside Kyoka, who is impressed by her bass skills.

Afterwards, she joins the rest of Class 1-A when Momo makes Golden Tips Imperial tea for all of them and Ochaco shows a curious Izuku a video about tea, making Airi laugh. The three see the villain Gentle Criminal and wonder about his crimes. Until the festival, the music team constantly practices the song devised by Kyoka and Airi. It is also during this time when she knows Izuku's plan to bring Eri to the festival.

On the appointed day, Airi tries to calm down Ochaco about the delay of Deku, who had gone out to buy a rope that morning. Fortunately, he gets there just in time, and Airi has fun with her classmates at 1-A's rock performance which ends up being a resounding success. After this, Airi enjoys the rest of the festival with Katsuki until the event ends. The Airi is seen poking fun at Katsuki.