Sougo Tokiwa

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 is the main protagonist of Kamen Rider Zi-O. He is a high-school student who transforms into and later .
==History==
===Background===
Sougo Tokiwa was born on April 28, 2000, as the only child of Sotaro and Namie Tokiwa. At some point in his childhood, Sougo was riding a bike at a park with his parents. He proclaimed to them that he would become a king, with his teenaged-self looking back at this event during the Quartzer incident.
On April 24, 2009, Sougo and his parents were involved in a bus accident orchestrated by Swartz. Sougo was among the children who were teleported away before the bus crashed inside a tunnel, killing the adults. The children woke up in an alternate future where a city was under attack by several Dai Mazines. After Sougo unconsciously saved Hiryu Kakogawa using his temporal abilities, Swartz realized the potential in Sougo and modified his memories. Returning to the site of the bus crash, Sougo was later admitted into the same hospital as Hiryu. After his discharge, Sougo began living with his grand-uncle Junichiro Tokiwa.
Since the incident, Sougo had a strong belief that he could become a king, much to the chagrin of those around him. According to his uncle, he was so serious to the point where had little friends growing up and lonely for his childhood. In elementary school, he befriended Tsutomu Tsuzumiya for sharing "absurd" dreams together. One day, a young Sougo had gotten hurt at a park and an unnamed high schooler treated his injuries. After playing with her, Sougo became infatuated with her and affectionally refer her as "Miss Sailor". He would go onto his teenage years attending Hikarigamori High School, excelling in history but poor in physics.
===Becoming Zi-O===
One day after school, Sougo found a mysterious Ridewatch and was visited by a hooded prophet named Woz, who warned him of Geiz Myokoin, who was out for Sougo's blood. After being saved by Tsukuyomi, Sougo learns of his inevitable future as the evil demon king Ohma Zi-O. Deciding not to forsake his dreams of becoming king, he became Kamen Rider Zi-O under the pretense that he'll become the "greatest and kindest demon king" instead. 
Geiz and Tsukuyomi continued to observe his actions while coming across the Time Jackers who began manipulating the timeline and creating the Another Riders. As they intended on replacing Sougo, Sougo cooperated with Geiz to combat the Another Riders while uncovering each host's motivations and modus operandi. Sougo learned of his predecessors whose powers were taken from the creation of these Another Riders, and went back in time to earn their respect before gaining their Ridewatches. From these encounters with his predecessors, Sougo would aspire to become a much greater and kinder king while going by the words of others.
Following the group's inital encounters with Tsukasa Kadoya, Sougo is transported into the year 2068 where he finally meets face to face with his future self, Ohma Zi-O. Despite hearing terrible things of what his future self did, Sougo didn't imagine that he himself really did commit these atrocities. He later returns to the present to have his Ziku-Driver destroyed, but this action did not prevent the Time Jackers from painting a target in his back. After receiving motivation from Geiz to continue pursuing being the "greatest and kindest Demon King", becoming Kamen Rider Zi-O once more. However, the decision to temporarily give up the Ziku-Driver began to diverge the timeline to new outcomes.
===The Unwritten Future===
After the new year had begun, Sougo have been having dreams of Kamen Riders from the future like the ninja Kamen Rider Shinobi in 2022 and the robotic Kamen Rider Kikai from 2121. Upon the arrival of a second Woz, referred to as White Woz, the group would discover that the timeline has diverged to a potential timeline where Geiz defeats Ohma Zi-O and became a "savior". Meanwhile, the Time Jackers had begun creating Another Riders based on the Future Riders, leading to White Woz to recover their powers as Kamen Rider Woz.
Noticing that his demon king was falling behind, Woz commissioned Junichiro to repair the Zi-O Ridewatch II, which Sougo learns was intended to be used on Oma's Day. However with White Woz's interference from the future, Sougo would gain its abilities even sooner and come across his Mirror World counterpart after falling into the Mirror World. Following his defeat, Sougo accepted his own dark side and evolves into Kamen Rider Zi-O II, but this evolution results in Geiz and Tsukuyomi growing fearful of him. 
While Sougo manages to scrape by to graduate high school, he comes across Hiryu Kakogawa who targets the previous Another Rider hosts as Another Zi-O. Hiryu blames Sougo for the bus accident that killed their parents, despite Sougo having little memory of the events. After Tsukuyomi's search into Sougo Tokiwa's past led to her apparent death, Geiz found the resolve to become GeizRevive to take down Zi-O once and for all. Despite this, Sougo and Geiz held a truce considering they still wanted to befriend each other and together defeated Another Zi-O and his Another Rider army, while Sougo reaffirms to Hiryu to focus on the future instead of the past. After Tsukuyomi returned, Sougo and Geiz laughed together as they reaffirmed their bond.
===Rider Time: Kamen Rider Ryuki===
Following the Another Zi-O crisis, Sougo and Geiz came across the mysterious emergance of Another Ryuki, who began to harm innocent people for reasons they have yet to understand. After being aided by Kamen Rider Ryuki, Sougo reunites with Shinji Kido as the latter passes on the Ryuki Ridewatch to him. This allowed Sougo and Geiz to finally defeat Another Ryuki, then Kamen Rider Odin for good.
===The Rise of Trinity===
Sougo began striving to create a new future with Geiz, Tsukuyomi, and Woz. While learning the reason behind Geiz and Woz's amimossity, Sougo encourages them to cooperate instead of being confrontational, believing their future can be change. However, a bitter White Woz allies himself with the Time Jackers and Daiki Kaito in an attempt to destroy the world by manipulating the Joker Undeads, Blade and Chalice. Sougo attempts to reach out to White Woz and encourages him to not give up. After retrieving a new Ridewatch, Zi-O merges with Geiz and Woz to become Kamen Rider Zi-OTrinity and were able to save the world. He was later visited with a message from Ohma Zi-O to gather the remaining Ridewatches if he needed more power to become king.
===Road To The King===
Being tasked to collect the six Ridewatches, Sougo embarks on a mission to meet with the six remaining Kamen Riders to prove his worthiness in inheriting their powers. In the process, the Time Jackers have begun creating Another Riders in the present in an attempt to prevent Zi-O from growing stronger. The group would additionally become aware of Tsukuyomi's sudden temporal abilities and how she had no memories of her childhood past. After resolving the Another Kiva incident with Jiro as well as Yuko Kitajima, whom Sougo falsely believed was his childhood crush "Miss Sailor", an extraterrestrial threat by the form of Kamen Rider Ginga arrives on Earth and proceeds to conquer the world, though he is defeated and absorbed into a Ridewatch for Kamen Rider Woz's GingaFinaly form. 
Having met Shoichi Tsugami, Kyosuke Kiriya, Jiro, and Arata Kagami for the Agito, Hibiki, Kiva, and Kabuto Ridewatches respectively, Sougo had only needed the Den-O and Drive watches left to achieve kinghood. During an encounter with the Taros, Sougo attempts to collect the Den-O watch from them, but Yuto Sakurai is unconvinced and attempts to stop him as he is very much aware of Ohma Zi-O's true power. Momotaros grants Sougo possession of the Den-O watch after recognizing Sougo's kindness and strength. With a copy of Drive's watch that Geiz previously stole from Ohma Zi-O, it grants Sougo the ability to become Kamen Rider GrandZi-O, allowing him to wield the power over the twenty Heisei Kamen Riders.
===The Time-Space Conspiracy===
After acquiring the power of GrandZi-O, Sougo is brought to the year 2068 to confront Ohma Zi-O with his newfound power but is defeated after learning he did not properly acquire the Drive Ridewatch through the correct means. As such, it creates a time anomaly that allowed Hiryu Kakogawa to become Another Zi-O II. Working together with Tsukasa, Sougo dethrones Hiryu and restore the timeline back to normal. This would allow the Drive Ridewatch that was acquired by Sougo's alternate timeline counterpart to come into the possession of the prime Sougo. 
However with Swartz having revealed himself to be Tsukuyomi's older brother, it began to affect the future as Michal Minato arrived in the present day to bring Geiz and Tsukuyomi back to their timelines. As Swartz steals Tsukasa's powers to become Another Decade, he summoned Dark Riders from different timelines, which completely overwhelms the Riders. Sougo was given three impossible choices to either let Tsukuyomi be erased from existence, let Swartz take his powers, or let history take course and become Ohma Zi-O. As Swartz's powers as Another Decade grows, the Ridewatches shatter and 19 different timelines began to converge all over the city. Sougo learns of Swartz's true agenda to gather the twenty Kamen Riders' powers from each dimension and create a new world. Sougo participates in to Tsukasa's plan to destroy his world but save the people in it. After revealing his identity to his grand uncle, Sougo arrives to the future to fight Ohma Zi-O one last time and overwhelmed his future self. Knowing that both won't defeat the other, Sougo is informed that Ohma Zi-O's power can is to destroy time and space itself. He returns to the present, having instigated Tsukuyomi to become a Kamen Rider, but she would seemingly betray the heroes for Swartz's servitude.
After sharing a final meal with Junichiro, Sougo arrived in the final battle as GrandZi-O. While he faced Another Decade and his army of villains, Geiz jumped in to shield Sougo in a devistating attack. In his dying breath, Geiz tells Sougo to become Ohma Zi-O and to become the "greatest and kindest" demon king. This allows an enraged Sougo transforms into Kamen Rider Ohma Zi-O and he orders Woz to rejoice to him. During their battle, Another Decade underestimated Ohma Zi-O having the powers of every Kamen Rider in existence and tries to escape. When Tsukuyomi sacrifices herself to immobilize Another Decade, Ohma Zi-O vanquished Swartz and destroying every monster in the battlefield. Although Sougo saved the world, he was intent to destroy the timeline he is in. With some parting words to his future self, Sougo rewrites the world's history to ensure he'll become king with his friends and the world is put back into twenty Earths.
===New Timeline===
After resetting the timeline, Sougo returns back to his normal life in September 2018. After having breakfast with Junichiro, he heads straight to school. In this new timeline, the people involved in the original events are shown to be alive and well, as well as having no memory of the original events. Geiz and Tsukuyomi become Sougo's classmates, along with Heure and Ora. 
However unbeknownst to Sougo, his parallel timeline counterpart who had dream about Zero-One had inadvertedly created a 21st A.R. World that temporarily merged with the main one. Because of this, the Time Jacker Finis managed to alter Kamen Rider Zero-One's timeline, forcing Sougo Tokiwa and his allies to regain their sealed memories. They were summoned to a world overrun by Humagears and works together with Aruto Hiden to figure out the time distortions. Upon encountering Finis, some of Sougo's powers were copied, allowing the Time Jacker to become Another 1. He also provided Aruto guidance after they learned his Humagear father, Soreo Hiden, seemingly created technologies of destruction, encouraging Aruto to change his future. While confronting Another 1, he fights with Zero-One to vanquish the Time Jacker. After Zero-One's timeline is restored, Sougo battled Aruto to seal everyone's memories of the following events while unmerging their words. 
Returning to a normal life without his memories of Zero-One or the previous timeline, Sougo still aspired to become king and still butts heads with Geiz, although on better terms. While Sougo tried to motivate his friend to find a future purpose, he is haunted when he learns that he would become an evil demon king in the future. After Woz informs him he will become a great and kind demon king instead, he was granted the Zi-O and GrandZi-O Ridewatches to become Kamen Rider Zi-O once more, amazed with the power of being a king. 
===Fighting Decade and Ohma Zi-O===
When Hikarigamori High School was brought into an alternate dimension, Sougo and his fellow classmates were trapped in this new realm which is surrounded by Elementary Inves. Since that time, Heure grew romantically attracted to Sougo, who desired to hand him a love letter. Sougo wanted to improve student conditions by organizing a festival, it became a flop due to little interest from the student body. When the Inves began attacking the students, Sougo transformed into Kamen Rider Zi-O to protect him, only to encounter two more Zi-Os much to his surprise.
He greets himself to his alternate counterparts and is referred as Sougo A from this point on. According to Woz, a mysterious force is combining different worlds with different Sougo Tokiwas into one. The three Sougos began to run for class president as a step to become king, with Sougo B and Sougo C gaining the popular votes. Sougo A also began helping Swartz cook the meat from the Inves at night. The next day, as Sougo A and Sougo C engaged in battle, Sougo A was seemingly killed by Sougo C. However, a delinquent Sougo Tokiwa and a Sougo with a teddy bear arrived.
It would later be revealed that both Sougos switched places and Sougo A had been impersonating Sougo C to avoid Heure. However, they didn't account for Sougo C's death, who was actually killed by Tsukasa Kadoya. As Kamen Rider Decade pursues the remaining Sougos, it drew the attention of the "true" Sougo, now in the form of a child who kills Sougo E and Heure. Sougo A fought the true Sougo as he transformed into Ohma Zi-O, using the Saber Ridewatch to become Zi-O DecadeArmor Saber Form. Despite the gap in power, Sougo A was able to defeat his opponent after Ohma Zi-O was momentarily blindsided. Sougo and his friends returned back to the normal universe. With Sougo B as the other surviving counterpart, they parted ways in good terms. Sougo, Geiz, and Tsukuyomi returned back to their normal lives in Hikarigamori High School.
===Erased Futures===
==Other Events==
;The following events currently do not have an established place within the main continuity.
===Kamen Rider Build: Be The One===
At some point in his history, Kamen Rider Zi-O joined a battlefield where the first eighteen Heisei Riders engaged in a battle against their numerous adversaries. When Sento Kiryu was inadvertently transported to their world by the White Pandora Panel, Zi-O arrived in his Time Mazine and stated he already had Build's Ridewatch, transforming to Kamen Rider Zi-O BuildArmor and wiped out all the monsters in the crossfire. Reverting to his default form, he introduces himself to Sento as Kamen Rider Zi-O, prophesied as the demon king with the powers of every Kamen Rider.
===Kamen Rider Heisei Generations Forever===
A powerful Time Jacker named Tid appears and creates two powerful warriors, Another Double and Another Den-O and orders them to pursue a young boy named Shingo. While Sougo attempts to protect him, he meets a young Kamen Rider fan named Ataru Hisanaga. Together with Sento Kiryu, they both discover that Kamen Riders were TV show characters and are not real. Returning to his world, Sougo acknowledged what happened and returned back to Ataru's world to save Shingo from Tid. With the mystery uncovered, Sougo and Sento head to the Kurogatake Mountains where they must face their true enemy, Another Kuuga. The twenty Heisei Kamen Riders reunite for a last Heisei battle together and Shingo is returned to his time.
======
As , Kamen Rider Blades, and the Taros were exploring the world of Journey to the West, Sougo Tokiwa arrives as a "demon king" to protect them from the Sentai Megid's forces as Kamen Rider GrandZi-O, summoning the Heisei Riders' to his assistance. While he is later erased after Shotaro Ishinomori rips up a drawing of him, Kamen Rider Zi-O was eventually manifested with every Kamen Rider and Sentai Red Ranger to battle Asmodeus' forces.
During the climatic final battle itself, he can be seen fighting alongside Gokai Red.
==Personality==
Sougo is an ambitious young man with a strong desire to become a king, being influenced by a dream he saw during his childhood. He is often blunt in formality, usually omitting honorifics toward elders. Sougo is empathetic with everyone, willing to forgive villains such as Yuko Kitajima, Heure, and Ora, believing it to be a quality that kings should possess. From his focus of kingship, Sougo does not have any particular set of goals once graduating high school, neither going to college nor finding a suitable career. 
Sougo is also very optimistic, as even after being warned that he will become a demon king, he believes things will work out and he will become the "greatest, kindest demon king". His positivity can be to a fault however, leading to his uncle telling him not to pretend to be okay when he feels sad and lonely, suggesting that all that pretending will lead to his future self not being able to understand people's sadness.
Initially, when facing his tyrannical alternate future self, Sougo became ingulfed with fear, temporarily discarding the Zi-O Driver. Upon Geiz's encouragement though, Sougo came to terms with his inner darkness, displaying emotional and psychological resilience against future dilemmas. 
Sougo also exhibits admiration towards the presence of legitimate regal figures (i.e.: Kuroto Dan) and ordinary people who possess benevolent king-like qualities (i.e.: Eiji Hino), believing he can learn from such individuals. However Sougo loathes those who abuse their authority, such as Swartz and the Another Riders, who were responsible for Heure's demise. This anger took a turn for the worst after Geiz and Tsukuyomi's deaths, causing Sougo to accept the power of Ohma Zi-O and murder Swartz without hesitation. Yet, despite his transformation into Ohma Zi-O, Sougo was able to prevent his grief from corrupting him, choosing to restore the multiverse for peace, hence living up to his ambition of becoming the "greatest, kindest demon king".
Optimistic in general, Sougo adds the verbal tic at the end of most of his sentences. Furthermore, Sougo has a tendency to come up with strange names for his Rider attacks, such as "Secret Technique, Orange Slash".
===Legend Rider Catchphrases ===
Occasionally when Sougo dons a new RiderArmor, he will say the original Rider's catchphrase, albeit somewhat altered:
*Build: The laws of victory have been set! (Sougo moves his hand back and forth after finishing, annoying Sento)
*Ex-Aid: With no continues, I feel like I can clear this game! (Sougo adds his verbal tic in)
*Ghost: I'm gonna try letting my life burn bright! (The original phrase is "My life will burn bright!")
*Gaim: Hanamichi, on Parade! (the original phrase is "Hanamichi, on stage")
*Fourze: I'm going to Space! (In the original script, Sougo adds a , which changes the original meaning of the phrase.)
*OOO: Seiya! (Sougo only says this at the end of Scanning Time Break)
*Double: Now, tell me your sins! (The original phrase is "Now, count up your sins!")
==Powers and Abilities==
===Powers===
*Reality Alteration: Like Tsukasa Kadoya before him, Sougo's very presence causes the various Rider worlds in the multiverse to merge with one another due to Swartz granting him space-time manipulation abilities. Even after Sougo rewrote the timeline, this ability is retained, resulting in the temporary merger between the World of Zi-O and the World of Zero-One.
*Time Manipulation: Upon acquiring the Zi-O Ridewatch II, it bestowed several abilities directly onto Sougo, allowing him to manipulate time as he wishes. All of these abilities were further augmented following his evolution into Ohma Zi-O.
**Temporal Rewind: Sougo can reverse time, allowing him to redo events he has personally experienced with his own eyes and change the future. So far, he has utilized the ability twice in order to undo the deaths of Geiz and Tsukuyomi. Since realizing the dangers of altering the very fabric of time, Sougo has stopped using this ability.https://twitter.com/cron204/status/1170370661555953670
**Temporal Freezing: Sougo possesses a temporal freezing ability similar to the one used by the Time Jackers, though the only time he ever used it was ten years ago when he saved Hiryu Kakogawa from the falling debris. 
**Prophetic Dreaming: Sougo's dreams of the future causes him to subconsciously integrate them into the timeline. While Sougo cannot control the contents of his dreams, his actions can influence the events that unfold, allowing Sougo to avoid the fated duel on Oma's Day.
***Rider Creation: Through this ability, any Rider that Sougo creates through his dreams are permanently integrated into the timeline. His usage of this ability has created Rentaro Kagura in 2022 and Rento Makina in 2121. Any Kamen Rider born from this ability will have its Another Rider version created in the present timeline.
**Retrocognition: Through unknown means, Sougo was able to look into Yuko Kitajima's memories.
**Timeline Reformatting: After evolving into Ohma Zi-O, Sougo gained the ability to warp reality, affecting the timeline itself. 
*Teleportation: Sougo after evolving into GrandZi-O gained the ability to teleport himself, which is helpful to him as defense against several attacks. This ability cannot be traced by the future sight ability belonging to both Zi-O II and Another Zi-O II.
===Abilities===
*Innovative Combatant: Throughout the course of his journey, Sougo has improved his combat skills considerably, rising from the ranks of an amateur combatant to a formidable warrior, who could contend with more seasoned warriors such as Geiz in a relatively short period of time. In regards to his fighting habits, Sougo is a resourceful and competent fighter who relies heavily upon his huge arsenal of Rider Armors and weapons. While not a fully technical fighter, Sougo approaches a fight in a composed manner and remains calm and level-headed under fire. He is a focused and cunning strategist who can adapt to most situations with innovative strategies.
*Vast Historical Knowledge: According to Tsukuyomi, Sougo excels in history, although Sougo can stumble on remembering some historical figures as Mondo Douan has shown to be more adept in this field than him.
*Keen Manipulator: Sougo has a talent for understanding how people would behave and subsequently exploiting people around him to do his bidding like how he tricked both Geiz and Tsukuyomi into watching Another Wizard's magic show with him and how he took advantage of Woz to make him cooperate with him and Geiz. Geiz considered his manipulative capabilities to be a serious threat and an indicator of his potential to become an evil demon king.
===Weaknesses===
*Poor Academic Performance: Though capable of studying if motivated, Sougo usually neglects his schoolwork, being ignorant on several subjects. This is first indicated when he first used the BuildArmor, and instead of proper equations, it simply listed sentences stating that he 'didn't know' or 'something I learned in grade school'. 
*Timeline Alterations: Evidently, Sougo can be affected by certain changes made in the timeline, something that can even nullify his powers as Ohma Zi-O. 
*Poor Gaming Skills: When Sougo played Mighty Action X, he failed several times to clear the game. This is also indicated when using Kamen Rider Ex-Aid's powers, failing to land a perfect on any of those attacks, implying that he is quite inept at using a Gamer Riders' powers.
*Future Sight Exploitation: Zi-O II's future sight can be countered by opponents that move at super-speed, such as GeizRevive Shippu and Kamen Rider PunchHopper. Currently this has only been fully exploited by Geiz, since Zi-O II was able to overcome this weakness in his battle with PunchHopper.
*Another Zi-O: While Sougo is able to coexist alongside his Another Rider counterpart, they are both liable against one another, due to sharing the same powers.
**Another Zi-O II: With Hiryu's evolution to Another Zi-O II, he is able to alter history itself. Though somewhat immune to the effects, Sougo will ultimately be endangered by this power if it is left alone.
===Former Weaknesses===
*Kamen Rider Drive: GrandZi-O could not completely control Drive's powers at full capacity due to him not having faithfully acquired the Drive Ridewatch through his usual means, and was easily countered by Ohma Zi-O. This weakness was ultimately solved when Sougo himself evolved into Ohma Zi-O and gained the powers of all Kamen Riders rightfully.
==Forms==
==Equipment==
===Devices===
*Ziku-Driver - Transformation device
**Ohma Zi-O Driver - Gold-colored upgrade variant of the Ziku-Driver
*Ridewatches - Transformation trinkets
*Ridewatch Holder - A strap to carry Ridewatches
*Faizphone X - Communication device
===Weapons===
====Handheld Weapons====
*Zikan Girade - Zi-O's and Zi-OTrinity's personal weapon and Zi-O II's secondary weapon
*RideHeisaber - Zi-O's personal weapon while using DecadeArmor
*Saikyo Girade - Zi-O II, Zi-OTrinity, GrandZi-O, and OhmaForm's personal weapon
*Zikan Zax - Zi-OTrinity's personal weapon
*Zikan Jaclaw - Zi-OTrinity's personal weapon
*Zikan Despear - Zi-O WozArmor's and Zi-OTrinity's personal weapon
====Suit-Equipped Weapons====
*Drill Crusher Crusher - BuildArmor's personal weapon based on the Drill Crusher
*Gashacon Breaker Breakers - Ex-AidArmor's personal weapons based on the Gashacon Breaker Hammer Mode
*Booster Module - FourzeArmor's personal weapons based on the Rocket Module
*Tora Claw Z - OOOArmor's personal weapon based on the Tora Claws
*Daidaimaru Z - GaimArmor's personal weapons based on Orange Arms' Daidaimaru
*Kamen Ride: Decade Card - In Ganbarizing, when Zi-O DecadeArmor and his Final Form Time utilizes Attack Time Break, he throws the Kamen Ride: Decade Card to his target and performs a variant of Decade's Dimension Kick.
====Legend Riders' Weapons Used by Zi-O DecadeArmor and GrandZi-O====
===Vehicles===
*Ridestriker
*Time Mazine
==Legend Rider Devices==
==Family==
Sotaro Tokiwa.png|Sotaro TokiwaFather (Deceased) 
Namie Tokiwa.png|Namie TokiwaMother (Deceased) 
Junichiro Tokiwa.png|Junichiro TokiwaUncle
*Junichiro: Sougo's uncle. Junichiro is often concerned with Sougo over the always wanted Sougo to face reality and take tests to get into a university, but he still respects Sougo's dream to become king. Junichiro is also prone to giving advice to Sougo. After Sougo reveals his alter ego as Zi-O, Junichiro was visibly shocked, but still encourage his nephew to do what he must do as a Kamen Rider.
==Relationships==
===Friends===
*(Kamen Rider) Tsukuyomi/Alpina: Tsukuyomi is the one that first informs Sougo about his future as Ohma Zi-O. Initially believed Sougo as evil as the future Demon King, Tsukuyomi joins Geiz at watching Sougo's every moves. Eventually, as Sougo shows his kindly disposition, Tsukuyomi mellowed and became his most trusted ally. However, when he evolved into Zi-O II, she reaffirms her resolve that Sougo must be killed before ascending into Ohma Zi-O. Since she believes that Zi-O II’s power to read the future is the same as Ohma Zi-O. Despite her paranoia towards him, she can't bring herself to kill the younger Sougo and instead tries to save him from Swartz. After learning from Tsukasa that Sougo's fate as Ohma Zi-O can be rewritten, Tsukuyomi starts to believe in Sougo again.
*Geiz Myokoin/Kamen Rider Geiz: Geiz strongly believes Sougo is Ohma Zi-O and is absolutely determined to kill him before he could become the demon king to prevent the future where Sougo supposedly becomes the tyrant that rules all with an iron fist. He refuses to call Sougo by his real name and cruelly refers to him as Ohma Zi-O. At many points in the show, Geiz shows Sougo hostility, but over the course of the story, he begins to realize that Sougo isn't as bad as he once thought. When Sougo finds himself in the future, Geiz even outright begs Sougo to give up the Ziku-Driver to prevent himself from becoming Ohma Zi-O, showcasing that his resolve to kill him has lessened greatly, and perhaps even sees him as a friend. Geiz also initially hesitate when Tsukuyomi advised him to stay away from Sougo due to his Zi-O II power. Although this might be because Sougo has information about Kikai. After Geiz acquired GeizRevive Ridewatch, their rivalry was renewed. But they also make amends after Tsukuyomi returns to them, alive and well. Sougo is also unaware of how much respect Geiz had held for him, and did not realize it until after he was gone.
*(Kamen Rider) Woz/Black Woz: With Woz having seen his future master's history and dreams to become king, Sougo is often baffled each time Woz appears aside from delivering his speech of passing Rider powers onto him by his predecessors. Despite even when Woz briefly sided with the Time Jackers to "correct" him, Sougo doesn't even seem to mind. Nevertheless, Woz remains a loyal servant and messenger towards Sougo. Over time, Woz becomes completely supportive of Sougo goal to become a benevolent ruler, regardless of whenever that goal resulted in Ohma Zi-O or not.
=== Allies ===
*Heure: When they first met, they were on obvious opposing sides and Heure had committed acts that Sougo condemned. However as the series progressed, Heure began showing hesitation and questioned Swartz's motives. He asked Sougo for help on several occasions, which eventually he opened up to Sougo. Eventually the two became fairly close, and Heure's death enraged Sougo to the maximum. In the new timeline, he became Sougo's classmates.
*Ora: They were enemies in the original timeline. However, in the new timeline, she became Sougo's classmates.
*Swartz/Another Decade: Swartz is the mastermind who set Sougo on the path to becoming a king in the first place, as well as Sougo’s ultimate nemesis during the series. However, in the new timeline, he became principal of Hikarigamori High School. He also helped Sougo as Another Decade to fight against Ohma Zi-O's armies.
*Legend Riders
**Sento Kiryu/Kamen Rider Build: The first senior rider Sougo met, Sento entrusted his past self to Sougo. They then fight together against the machinations of Super Time Jacker Tid.
**Ryuga Banjo/Kamen Rider Cross-Z: To be added
**Emu Hojo/Kamen Rider Ex-Aid: To be added
**Hiiro Kagami/Kamen Rider Brave: To be added
**Takumi Inui/Kamen Rider Faiz: During the case of Another Fourze's attacks towards students with a Libra horoscope sign, Sougo and Takumi attempt to protect Karin, a Libra student who Another Fourze wants to keep alive. Takumi grants Sougo a Faiz-themed Ridewatch, though the latter gives it to Geiz. 
***Masato Kusaka/Kamen Rider Kaixa: Kusaka is confronted by his rival Takumi Inui when he attempted to kill Karin, a classmate and girlfriend of Ryuichi Sakuma, who is Another Fourze. When the Another Fourze case is resolved, Kusaka peacefully parts ways from Takumi.
**Eiji Hino/Kamen Rider OOO: Sougo likes Eiji's view about helping people that are reaching out to him, and notes that Eiji has a kingly disposition too.
**Kouta Kazuraba/Kamen Rider Gaim: Sougo meets the version of Kouta that ascended into the Man of the Beginning, and the space god teaches Sougo the most important thing to have as a king: a person he can fully trust.
**Ryotaro Nogami/Kamen Rider Den-O: To be added
**Takeru Tenkuji/Kamen Rider Ghost: As Takeru is the only one that can see Sougo in his spirit form, Sougo trusted him to enact his plan at saving Another Ghost's host. Then, Takeru helps Sougo return to his body.
**Tsukasa Kadoya/Kamen Rider Decade: Tsukasa provoked Sougo by saying that he will destroy his world. Tsukasa also sends Sougo into the year 2068 to witness his rule as Ohma Zi-O. After being cornered by Zi-O and Geiz however, he escaped with the promise to fight him again in a foreseeable future. But, actually Tsukasa's true motive is to destroy Zi-O's world if he ever becomes Ohma Zi-O. Tsukasa later appears to help Sougo against Another Zi-O II and his army of Another Riders, and somewhat becoming an uneasy mentor for him.
**Shinji Kido/Kamen Rider Ryuki: It was Shinji who taught Sougo that he must accept his dark side in order for him to move on from the past. Later, Sougo is happy to see Shinji reunited with the latter's boss.
**Kazuma Kenzaki/Kamen Rider Blade: To be added
**Hajime Aikawa/Kamen Rider Chalice: To be added
**Daiki Kaito/Kamen Rider Diend: He appears suddenly to steal Sougo's Ridewatches, seemingly on White Woz's command. But actually he is Ohma Zi-O's underling, and his true aim is White Woz's future tablet.
**Shoichi Tsugami/Kamen Rider Agito: To be added
**Kyosuke Kiriya/Transformed Kyosuke/Kamen Rider Hibiki: To be added
**Tomizo Todayama/Kamen Rider Todoroki: To be added
**Arata Kagami/Kamen Rider Gatack: To be added
*Future Riders
**Rentaro Kagura: He met Sougo in a dream and helped him choose his own future and resist Swartz.
**Mondo Douan: Sougo defended and saved him from Geiz, but later it turned out that the power of Quiz is needed for the Ridewatches.
**Rento Makina: Sougo develops a good friendship with Rento as the latter saves him from Humanoise as Kikai. Sougo was also horrified as Kikai was unwillingly brainwashed to kill him. After Sougo undoes Rento’s reprogramming, Rento thanked him. It was revealed that Rento was the physical manifestation of Sougo's toy robot who was his only friend in his childhood.
*Reiwa Riders
**Aruto Hiden/Kamen Rider Zero-One: He met Aruto as Kamen Rider Zero-One in a dream, later, he met him to defeat Finis, a Time Jacker who created Another Zero-One and prevented the Daybreak Town Incident. Then he challenged Aruto in a friendly duel. Both Sougo and Aruto, reunited and happily gave each other fist bump, then sees various Kamen Rider and Super Sentai villains led by Rider World and Sentai Megid. Then, Sougo and Aruto, along with the other Sentai heroes, Imagins, Zenkaigers, Zenkaizer and Zenkai Zyuran, Saber Riders, Saber and Blades, Secchan and Mei were erased by Shotaro Ishinomori, who was manipulated by Asmodeus. Sougo and Aruto were remanifested along with the other Legend Riders led by Kamen Rider Ichigo and Sentai Red Rangers led by Akarenger.
===Enemies===
*Ohma Zi-O: When Sougo first learned of Ohma Zi-O through Tsukuyomi, he initially didn't believe her. When he does believe her claim, he becomes determined to change his fate, but he otherwise still remains skeptical of how dangerous Ohma Zi-O is according to her and Geiz. It wasn't until a proper meeting when he was sent to the future that he understood the reason why he was feared. Sougo despises what his future self has become, and is even more determined to change his fate. However, this results Sougo unable to keep his cool whenever facing Ohma Zi-O in combat. Ohma Zi-O on the other hand, didn't see Sougo as a threat, even after Sougo obtains GrandZi-O Ridewatch. However, Ohma Zi-O still aids his younger self and didn't really intend to kill him, presumably to secure his own existence as well.
*White Woz: Being Woz from a different timeline where his future self was dethroned, the other Woz sees Sougo as a threat due to the fact that White Woz's loyalty lies with GeizRevive. White Woz, however, doesn't see Sougo as a big hindrance, until Sougo becomes Zi-O II. Ironically, Sougo is the one behind White Woz’s redemption, to the point that White Woz willingly gives Sougo his Zi-O II Ridewatch, GeizRevive Ridewatch, and the newly created Zi-OTrinity Ridewatch. White Woz also show his interest in Sougo’s possibility to alter the future to his counterpart, moments before he is erased from the timeline. White Woz willingness to help Sougo was shown even after his revival by Swartz, although he simply cover it up by his loyalty to Geiz.
*Hiryu Kakogawa/Another Zi-O (II): Hiryu thought that his parents were dead in a bus accident in 2009 because of Sougo, vividly remembering a woman in white dress aiming her gun at Sougo. Since then, Hiryu hates Sougo with a passion, even going as far to become Another Zi-O, just to kill him. Sougo then advises Hiryu to stop dwelling in the past and keep moving forward. However, Hiryu took it as an insult and became more hateful towards Sougo when they met again when the timeline was altered. In the end, Sougo had no choice but defeat him once more using GrandZi-O.
*Tsutomu Tsuzumiya/Another Hibiki: Tsutomu is Sougo's childhood friend, who dreams to become an Oni. Due to both of them having a seemingly 'absurd' dream, they supported each other.
*Yuko Kitajima/Another Kiva: Yuko is mistaken by Sougo as his first love from when he was still in elementary school. Despite this, Yuko's shown to have a soft spot to him. she affectionately calls him a cute boy, tending his wounds and pinching his chin as a gesture. Sougo also don't mind shielding her from enemies’ attack, even after knowing her identity as Another Kiva. It is shown that both of them develop a romantic relationship, to the point of Yuko indirectly proposes Sougo to marry her. Although Sougo later learns that Yuko is not his first love, he still hesitant to attack her. Upon Yuko’s demise by the hand of Ora, Sougo grieves over her dead body, showing that despite their short-lived relationship, he had grown fond of her.
*Legend Riders
**Kuroto Dan/Kamen Rider Genm/Another OOO: Sougo serves Kuroto to complete his ambition of becoming king, but soon betrays him because he believes that a king must care about people (which Kuroto does not). Sougo also thinks he is the only king the world needs.
**So Yaguruma/Kamen Rider Kick Hopper/Another Kabuto: To be added
**Shun Kageyama/Kamen Rider Punch Hopper: To be added
*Future Riders
**Kamen Rider Ginga: An unknown evil rider who becomes the 9 5 DO members and Time Jackers’ common enemy during Another Kiva’s emergence.
==Behind the Scenes==
===Portrayal ===
Sougo Tokiwa is portrayed by . As Kamen Rider Zi-O, his suit actor is , who has been the leading suit actor for the majority of the main Heisei Riders (minus Kuuga and Hibiki). Zi-O is Takaiwa's final suit acting role for the main Rider. In Geiz, Majesty, his suit actor is Takuma Komori. In Superhero Senki, his suit actor is Kazuya Okada.
===Rider No.===
As the leading rider protagonist of Kamen Rider Zi-O, Zi-O is labeled and .
===Etymology===
Sougo Tokiwa's name is a combination of (時, Toki), meaning time, and (大言壮語, Taigensougo), meaning to exaggerate『宇宙船』(Uchuusenn) vol.162. Evidently, the producer of Kamen Rider Zi-O has denied Sougo's name to be a play on , the place where Shotaro Ishinomori lived and started his manga career during 1956 to 1961. 
==Notes==
==Appearances==
==Navigation==
Category:Kamen Riders
Category:Zi-O Riders
Category:Zi-O Characters
Category:Primary Riders
Category:Heroes
Category:Antiheroes
Category:Heisei Era Riders
Category:Heisei Phase 2 Riders