History Characters / KamenRiderGeatsKeiwaSakurai

!!!'''Portrayed by:''' Ryuga Sato (live); Eitoku [TV series], Takahiro Yoneoka [''Jyamato Awaking''] (suit)

* PunnyName: In Eastern name order, "Sakurai Keiwa" sounds an awful lot like "sekai heiwa", Japanese for "world peace". Lampshaded with his ''ema'' in #49, which simply reads "World Peace -- Sakurai Keiwa"[[note]]Sekai heiwa -- Sakurai Keiwa[[/note]]

!!!'''Portrayed by:''' Ryuga Sato (live); Eitoku [main], Takahiro Yoneoka [''Jyamato Awaking''] (suit)

!!!'''Portrayed by:''' Ryuga Sato (live), Eitoku (suit)

** Late in the series, Keiwa ends up becoming this to [[Series/KamenRiderGaim Kaito Kumon]]. Both are secondary Riders who gain a new form (Bujin Sword Tycoon and Lord Baron respectively) after crossing the DespairEventHorizon by failing to protect the people they care about, pulling a FaceHeelTurn in the process. As a result, both Kaito and Keiwa deliver {{No Holds Barred Beatdown}}s and {{Curb Stomp Battle}}s to the {{Mad Scientist}}s whose experiments with plant-like entities and godhood-seeking complexes were responsible for all the tragedies they faced. While Kaito succeeds in killing Ryoma, Ace stops Keiwa from killing Daichi. They also end up getting into one last final battle with the lead Riders of their respective series in order to remake the world in their image. Kaito dies to Kouta, but Keiwa survives due to Ace purposely throwing the fight, and Ace convinces him to believe in his ideal world where everyone can be happy, making Keiwa pull a HeelFaceTurn as a result.
** He's also this to his direct predecessor, [[Series/KamenRiderRevice Daiji Igarashi]]. They both gain a new form related to their inner demons, but Daiji gets rid of his inner demon while Keiwa embraces his. They also cross the DespairEventHorizon after failing to protect the people they care about, going full on KnightTemplar and joining their series' BigBad during their FaceHeelTurn before [[HeelFaceTurn turning back to the heroes’ side]], but Daiji opposes his family and was willing to sacrifice them to "save the world" since they continue to oppose Giff. Keiwa, in contrast, becomes apathetic towards the world, and is willing to sacrifice other people and their happiness to revive his family at the expense of everyone else.

** [[Series/KamenRiderZeroOne Fuwa]], [[Series/KamenRiderSaber Rintaro]], and [[Series/KamenRiderRevice Daiji]] were all [[ExperiencedProtagonist established members of military organizations]] when their respective series began, and each were characterized as being far more serious in personality than their corresponding protagonists. Keiwa flips this script by being a civilian NaiveNewcomer in the DGP who has to grow and learn to become more capable, and is tricked several times in the process. Keiwa is additionally distinguished from Fuwa (who comes from a series also written by Yuya Takahashi) by being a good-natured young man trying to support his family (like many other lead Riders have tended to be), contrasting the elusive and arrogant Ace. An additional difference on Keiwa's part is that he [[ProtagonistJourneyToVillain becomes a worse person later]] (similar to the aformentioned Daiji), while Fuwa [[TookALevelInKindness mellows out]] throughout the series.

* CorruptedCharacterCopy: Of [[Series/KamenRiderGaim Kouta Kazuraba]]. Both of them are ordinary, orphaned young men who look for jobs to support their [[CoolBigSis supportive older sisters]], and both of their families eventually get roped into a massive conspiracy involving the major organizations of their respective stories. Additionally, Kouta and Keiwa both fight against a purple Rider nicknamed "Micchy" and a standoffish Rider with a construction background who are willing to go to extremes to root out a corrupt system (Michinaga fits both descriptors in Keiwa's case), both their {{Super Mode}}s are themed after Shoguns, and both obtain godlike powers. However, Kouta only fights against Mitsuzane to get through to him and regain their friendship, and though Kouta does kill Kaito to prevent him from destroying the world, Kouta ultimately uses his new power as the Man of the Beginning to relocate the Helheim Forest to somewhere where the Inves cannot do harm. Keiwa, on the other hand, eventually undergoes a FaceHeelTurn after losing his sister, and while Keiwa's fight against Michinaga initially started off to protect people and other Riders from his attacks, it escalates into revenge once Michinaga kills Sara. Additionally, when Keiwa becomes the Desashin, he does so through underhanded methods by kidnapping Tsumuri, and uses the wish she grants him to resurrect those killed by the DGP -- however, it endangers the world instead of saving it, as many of the Riders thus resurrected have far fewer moral scruples.

* {{Expy}}:
** He is very similar to [[Series/KamenRiderExAid Emu Hojo]], a character from another series written by Yuya Takahashi. They are both {{Nice Guy}}s and [[WideEyedIdealist idealists]] who want to make others happy, with Emu wishing to bring smiles to his patients' faces while Keiwa says that he's happy as well if others are. They are also the most noticeably and unambiguously good Riders in their clique who hope that everyone else will get along. And they are both rather naive and gullible, as Emu gets tricked by Taiga and Kiriya multiple times while Keiwa is also tricked by Ace in episodes 2 and 7, yet they both get a WhatTheHellHero moment from said tricksters shortly after. They also got a scene where they urge the other Riders to work together, only to get rejected. However, one fundamental difference separates them: Emu is the main Rider of his series while Keiwa is the secondary Rider.
** Both Keiwa and [[Series/KamenRiderZeroOne Aruto]] are orphaned young men from a Kamen Rider series written by Yuya Takahashi that are put through enormous amounts of trauma over the course of their respective stories. Their similarities become more apparent near the end of both ''Zero-One'' and ''Geats'', where after a loved one of theirs dies due to being caught up in the conflict, they both become examples of the franchise's most morally upright characters who become {{Fallen Hero}}es due to failing to cope with the ongoing pain and suffering they have to deal with, and unwittingly cause a huge war with their actions.

** [[JustForPun Geats]] is TheAce, incredibly self-confident and reassured, and able to perform incredibly well in the DGP thanks to his clear tactical knowledge and ability to keep a clear head. Tycoon is riddled with self-doubt, and is barely able to fight at the start of the series, choosing to instead focus on rescuing civilians.

** Idealistic characters who shoulder their burdens alone usually ensure that others are rewarded at great personal cost to themselves, but Keiwa's refusal to trust his feelings to others not only costs him dearly, but hurts other people -- his self-inflicted pain and mistrust means that he brushes off others who want to help him when he finally gives in to cynicism, and he resorts to extreme plans to achieve his goals because he won't trust in anyone else. He's so adamant about doing things his way for immediate short-term gains without thinking of the bigger picture.

* DeconReconSwitch: While Keiwa's character arc is a realistic look at how an idealist would cope with a battle royale survival game and deal with tragic losses constantly being stacked on their shoulders, it also ultimately reinforces some of the most important lessons that the idealist winds up learning or embodying in "survival game" series -- there are some problems that can only be solved by trusting in other people to help you, and doing so is how you truly make long term changes. While you may have to endure some difficulty and put in effort to follow your ideals, relying on easier, more extreme methods aren't necessarily better in the long run even if the benefit can be immediate. Working with the DGP management to try and use their RealityWarping powers to his own ends only winds up hurting Keiwa's efforts to get what he wants, and actively hinders him by making him an easy pawn for the DGP to control. In contrast, Keiwa's fervent desire to believe in a world where it's possible to get Sara back allows Ace to revert the world back to the post-Grand End state that Ace initially created in the ''Genesis'' arc, and with these reversed circumstances plus Ace's encouragement, Keiwa manages to save Michinaga from Kekera ''and'' gets his sister back in the bargain.

* DidntThinkThisThrough: After Michinaga accidentally kills Sara, Keiwa goes through a mental breakdown so bad that he's willing to hand over Tsumuri to the DGP and get her forcibly turned into the next Goddess of Creation to make her grant his wish to revive all of the DGP's victims. However, not all of those people are wholly benevolent or even moral in any way, something Keiwa knows all too well from personal experience, which results in a CrapsackWorld ruled by criminals who abuse the Rider powers given to them and [[InSpiteOfANail kill his family, as well as God knows how many people]], [[AllForNothing effectively rendering the reason Keiwa went through with his betrayal moot]]. Alternatively, by giving them a Goddess of Creation to abuse, he's ensured that the DGP is still running and can cause further harm despite making a wish that's made to fix all the damage they did, where Zitt might have engineered his wish to turn out this way in order to further string them along in their machinations.

** By far one of his most notable flaws is that he [[DidntThinkThisThrough doesn't stop to think through what he's doing]] and tends to go with his gut over his head. This is foreshadowed as early as his job interview in the first episode: he states that world peace is his goal, but when his interviewers ask [[AndThenWhat what else comes after that]], he can't answer. While this is initially used to establish how naively optimistic he is, his lack of forethought also shows in the earlier examples of his tendency to throw himself at problems, and it eventually comes back to bite him when he finally gets his wish to revive all who have lost their lives to the DGP in the hopes that his and others' families will regain their lost loved ones, where it perpetuates the DGP's crimes in Zitt kickstarting the Apocalypse Game, and evil Riders are revived as well, abusing their powers to murder people, including Keiwa's own family. Even once he ''does'' suspect something, he chooses to believe that the simple solution is to become the Desashin once more and make another wish for his family's revival.

** In the ''Divergence'' arc, Daichi dismissed Keiwa (and Neon) as being simple after figuring out his wish. Later in ''Genesis'' arc, this trait of Keiwa catches Daichi's attention instead, to dedicate himself into observing the happiness found in "boring" lifestyle, after Daichi absorbed his sister Sara and many other people's memories and then losing it.

** #41 makes it clear that this cynicism is something buried deep inside him and not just a one-off from the first episode, as losing Sara brings it back with a vengeance. First, he bitterly questions what the point of wishing for world peace even is when Sara's no longer around. His cynical edge also made him resort into using the method that guarantees him the results for his goal, even if it harms others -- instead of working toward an ideal world with Ace and the other Riders, he sides with the DGP by helping them turn Tsumuri into the next Goddess of Creation, by using Tsumuri's sympathy for his loss to get the Bujin Sword Buckle, and selling her out to Zitt, so that he can get his wish to revive Sara and fix the damage the DGP caused granted.

* UnwittingInstigatorOfDoom: Keiwa's wish to revive all the DGP's victims end up being used as a crux for the DGP to kickstart Apocalypse Game, where many of those revived from his wish go on a worldwide crime spree — getting his own family and many other people killed. Though Keiwa has pulled a FaceHeelTurn, turning the world into CrapsackWorld isn't the outcome he desires.

* WideEyedIdealist: Downplayed. While he is shown as a FriendToAllLivingThings type, his rant towards Ace in the middle of #1 shows that he's more cynical than he appears to be on the surface. He expresses frustration about his life being cut short, and how aimless his life was to start with. Once Sara dies, it forces his dormant cynicism to the surface which amplifies his negative traits to an extreme, and it takes Ace letting himself getting brutalized by Keiwa to prove a point and seeing Ace willingly take on the burden of becoming the God of Creation for Keiwa to recapture his idealistic spirit.