History Characters / KamenRiderGeatsDesireGrandPrixParticipants

* KarmaHoudini: Downplayed. He always got punished for his crimes before and his schemes are never truly successful, but at the finale he manages to live and continue chasing after what he wants, albeit something that can be accomplished without evil means, after he quits being antagonistic and helps Ace and co, compared to other villains who met their end. He's even regarded as a father figure of sorts by the Jyamato, even though he was [[EatsBabies eating baby Jyamato]] just a few episodes before.

* WeakButSkilled: He manages to go toe-to-toe against Kousei who is using the much more powerful Fantasy Buckle, despite using Raise Hammer, due to Kousei's lack of experience in fighting compared to Kazuo being a former DGP player.

* NiceGuy: A genuinely friendly and jovial old man who tries to get along with other competitors and is protective of people, even when it endangers him.

* EasilyForgiven: Courtesy of Ace reminding Keiwa to hate the sins but not the sinners, Keiwa forgives Daichi after he frees Sara from the Tree of Knowledge, fully understanding that Daichi only wants to observe Sara's happiness in order to understand it better. This forgiveness also comes despite Daichi's indirect hand in maiming and/or traumatizing people with the Jyamato Grand Prix, his parasite Jyamato, and assimilating people into his Tree of Knowledge. Keiwa admitting that he himself has done some awful things too [[HeelFaceTurn before coming back to his senses]] is likely why he let bygones be bygones, even though what Daichi did was much worse and had much more selfish intentions than anything Keiwa did.

** To fellow Jyamato faction Rider Michinaga. Both are {{Wild Card}}s willing to switch allegiances to further their goal of obtaining their own ideal worlds. Daichi, though, focuses more on getting knowledge, while Michinaga is exclusively more power-hungry. Furthermore, Michinaga's villainy is done for a [[WellIntentionedExtremist good cause]] compared to Daichi's self-centered motivations.

* KarmaHoudini: He played an active role in the Jyamato Grand Prix which got lots of people killed, infected dozens of people with his parasite Jyamato in order to [[AndIMustScream assimilate them into his tree]] in order to absorb their knowledge, and played a key role in tormenting Keiwa and driving him over the edge, but he gets let off for his crimes after he helps Ace and co. In the finale he's even regarded as a father figure of sorts by the Jyamato, even though he was [[EatsBabies eating baby Jyamato]] just a few episodes before.

* WhatHappenedToTheMouse: He gets knocked out and loses his Rider transformation, but we don't see what happens to him afterwards, especially as it's not revealed whether he was one of the deceased Riders brought back by Keiwa like Kirito.

** To Michinaga himself; him and Morio are both willing to do whatever it takes to win and are paired together in Concentration game, but Michinaga doesn't hide his dislike of his competitors, is regularly honest, and is upfront about his methods to get rid of them. Morio, on the other hand, puts up a kind facade to hide his true colors, is a chronic liar, and happily uses sneaky tactics like backstabbing others to gain the upper hand.

* CantCatchUp: [[spoiler:When he returns in #45, three of the four main characters have gotten very powerful upgrades. When Sumida attacks Neon, who has the Fantasy Buckle, he's hopelessly outmatched even when given power ups by the audience -- he gets access to only a regular Large Raise Buckle (Beat) and the unused [[LethalJokeItem Water]]. Neon only gets hold back by her mother being on the way, forcing to alternate between fighting him and protecting her, and her beatdown on him only stops when he manages to injure Neon's mother.]]

** Both him and Michinaga are two of the [[{{Jerkass}} rudest]] players in the ''Encounter'' arc, and both share a desire to destroy a specific group of people, but Michinaga's bloodlust is limited only to Riders, while having a sense of honor--while he has the capability of harming innocent civilians as well, he only does so if he thinks [[WellIntentionedExtremist it's a necessary sacrifice for the greater good]]. Kanato, however, just hates all of humanity and wants everyone to suffer as he did without exception, with him willing to stoop to any lows to hurt them. [[spoiler:When Kanato returns for the ''Genesis'' arc, Michinaga, who is actively working toward redeeming himself, notes that Kanato is as sour-hearted as ever once they meet again.]]

* {{Irony}}: His old age is his main reason he becomes a Kamen Rider. Because of his old age, he also has to stop being a Rider.

* NiceGuy: A genuinely friendly and jovial old man who tries to get along with other competitors and is protective of people even when it endangers him.

* EasilyForgiven: Courtesy of Ace reminding Keiwa to hate the sins but not the sinners, Keiwa forgives Daichi after he frees Sara from the Tree of Knowledge and protecting her from Kekera, fully knowing that Daichi only wants to observe Sara's happiness in order to understand it better. This forgiveness also comes despite Daichi's indirect hand in maiming and/or traumatizing people with the Jyamato Grand Prix, his parasite Jyamato, and assimilating people into his Tree of Knowledge. Keiwa admitting that he himself has done some awful things too [[HeelFaceTurn before coming back to his senses]] is his reason why he'd let bygones be bygones, even though what Daichi did was much worse and had much more selfish intentions than anything Keiwa did.

** To fellow Jyamato faction Rider Michinaga. Both are {{Wild Card}}s willing to switch allegiances to further their goals of obtaining their own ideal worlds. Though, Daichi is knowledge-hungry while Michinaga is power-hungry. Furthermore, Michinaga's villainy is done for a [[WellIntentionedExtremist good cause]] compared to Daichi's self-centered motivations.

* TokenEvilTeammate: He's the most underhanded and outright villainous participant in the "Divergence" season, to the point where he manages to do more to sabotage the Riders than the actual Desastar. He's also this to the protagonists in the ''Genesis'' arc after Keiwa's beatdown, only working with them to satisfy his interest in how humans think about happiness.
* TooCleverByHalf: He knows how much of a genius he is to an insufferable degree, and it can bit him in the ass, primarily due to him making plans based on logical course of action without taking into account of humans making an emotional choice. Instead of working with Neon and Sara to gather enough Core [=IDs=] to vote out [[NobleDemon Michinaga]], Daichi instead tries to set them up to be eliminated by him, expecting Michinaga to only care about more Riders being eliminated thanks to his "help", but it angers Michinaga instead for his treachery.
* TookALevelInKindness: Against the Jyamato, he goes from someone who wants to use them to sate his thirst for knowledge--down to literally eating infant Jyamato to increase his knowledge--to taking up Archimedel's style of nourishing the Jyamato with care and affection, akin to running a daycare.

* IdiotBall: When confronted by Buffa, instead of attempting to flee and giving the ID Cores he selected to Sara so he can get her to eliminate Buffa from the game, he tries attacking Buffa even though Buffa is virtually immune to anything he or any other Riders could do against him.

** To Michinaga himself; him and Morio are both willing to do whatever it takes to win, but Michinaga doesn't hide his dislike of his competitors, is regularly honest, and is upfront about his methods to get rid of them. Morio, on the other hand, puts up a kind facade to hide his true colors, is a chronic liar, and happily uses sneaky tactics like backstabbing others to gain the upper hand.

* CantCatchUp: [[spoiler:When he returns in #45, three of the four main characters have gotten very powerful upgrades. When Sumida attacks Neon, who has the Fantasy Buckle, he's hopelessly outmatched even when given power ups by the audience -- he gets access to only a regular Large Raise Buckle (Beat) and the unused [[LethalJokeItem Water]]. The only reason Neon doesn't continue to beat him down is because he manages to injure Neon's mother.]]

** Both him and Michinaga are two of the [[{{Jerkass}} rudest]] players in the ''Encounter'' arc, and both share a desire to destroy a specific group of people, but Michinaga's bloodlust is limited only to Riders--while he has the capability of harming innocent civilians as well, he only does so if he thinks [[WellIntentionedExtremist it's a necessary sacrifice for the greater good]]. Kanato, however, just hates all of humanity and wants everyone to suffer as he did without exception. [[spoiler:When Kanato returns for the ''Genesis'' arc, Michinaga, who is actively working toward redeeming himself, notes that Kanato is as sour-hearted as ever once they meet again.]]

* NiceGuy: A genuinely friendly and jovial old man. So nice in fact that he willingly and happily gives up his place in the DGP to allow Keiwa back in.

* EasilyForgiven: Courtesy of Ace reminding Keiwa to hate the sins but not the sinners, Keiwa forgives Daichi after he frees Sara from the Tree of Knowledge, even though Daichi's only real motivation is to observe Sara's happiness in order to understand it better. This forgiveness also comes despite Daichi's indirect hand in maiming and/or traumatizing people with the Jyamato Grand Prix, his parasite Jyamato, and assimilating people into his Tree of Knowledge. Keiwa admitting that he himself has done some awful things too [[HeelFaceTurn before coming back to his senses]] is likely the reason why he's able to let bygones be bygones, even though what Daichi did was much worse and had much more selfish intentions than anything Keiwa did.

** To fellow Jyamato faction Rider Michinaga. Both are {{WildCard}}s willing to switch allegiances to further their goals of obtaining their own ideal worlds. Though, Daichi is knowledge-hungry while Michinaga is power-hungry.

* HazyFeelTurn: He's a manipulative, sadistic, baby-eating sociopath for most of the series. He later settles down via a VillainousBSOD from Keiwa's beatdown and a conversation with Ace. Though he's more willing to aid the heroes, it's largely because he's lost most of his leverage, and his motivation is still focused on his interests in human thought and memory (or more specifically, "happiness"); he still finds the likes of Sara's memories to be "simple and boring" even though he wants to understand how people find joy in such average lives. However, he is more than content to work in the Jyamato Garden and promote coexistence between Jyamato and humans.

* IdiotBall: Two in #35. Instead of working with Neon and Sara to gather enough Core [=IDs=] to vote out Buffa, Daichi instead tries to set them up to be eliminated by him. When confronted by Buffa, instead of attempting to flee and giving the ID Cores he selected to Sara so he can get her to eliminate Buffa from the game, he tries attacking Buffa even though Buffa is virtually immune to anything he or any other Riders could do against him. It's starkly in contrast to the intelligent and pragmatic strategist he was established to be previously.

* RetiredMonster: He decides to put aside infecting people in favor of observing how people like [[RidiculouslyAverageGuy Keiwa and Sara]] can be happy despite their simple lives, effectively ending his tenure as an antagonist. While he doesn't openly seem to regret his actions, he acknowledges that he sold his soul to the Jyamato and that he was a horrible person when Keiwa thanks him for his help.

* TookALevelInKindness: He goes from someone who wants to use the Jyamato to sate his thirst for knowledge--down to literally eating infant Jyamato to increase his knowledge--to taking up Archimedel's style of nourishing the Jyamato with care and affection, akin to running a daycare.

* TokenEvilTeammate: He's the most underhanded and outright villainous participant in the "Divergence" season, to the point where he manages to do more to sabotage the Riders than the actual Desastar. He's also this to the protagonists in the ''Genesis'' arc after Keiwa's beatdown, only working with them to satisfy his interest in how humans think about happiness.

* ReasonableAuthorityFigure: Though he ends up turning down Keiwa's job application, outside of it he's nothing but polite to him and appreciates his desire to bring world peace better.

* SuperSwimmingSkills: His personal accessory, dubbed the ''Ginpen Pullum'', grants him increased speed underwater and the ability to manipulate water currents. Never displayed in the show.

** To fellow Jyamato faction Rider Michinaga. Both are {{WildCard}}s willing to switch allegiances to further their goals of obtaining their ideal worlds. Though, Daichi is knowledge-hungry while Michinaga is power-hungry.

* {{Expy}}: He’s effectively Kabuto Yakushi from the [[Manga/{{Naruto}} Naruto]] manga series.

* Expy: He’s effectively Kabuto Yakushi from the [[Manga/{{Naruto}} Naruto]] manga series.

* FinishingMove: '''[=BeatMagnum=] Victory'''[[note]]Magnum upper body, Beat lower body[[/note]]: Da·Paan stomps the ground twice, conjuring a swarm of energy musical notes that converge on the target and detonating on impact.

* BeingEvilSucks: In the ''Genesis'' arc, Ace implies that by absorbing people's memories, Daichi gets to experience their joy firsthand, but also has to deal with the guilt of trampling on their dreams. He then tells Daichi that to be truly happy, he must atone for his wrongdoings. [[ThePollyanna Sara]]'s memories in particular haunt Daichi enough to make him focus on learning what about her "simple" lifestyle makes her so happy.

* EasilyForgiven: Courtesy of Ace reminding Keiwa to hate the sins but not the sinners, Keiwa forgives Daichi after he frees Sara from the Tree of Knowledge, even though Daichi's only real motivation is to observe Sara's happiness in order to understand it better. This forgiveness also comes despite Daichi's indirect hand in maiming and/or traumatizing people with the Jyamato Grand Prix, his parasite Jyamato, and assimilating people into his Tree of Knowledge. Keiwa admitting that he himself has done some awful things too [[HeelFaceTurn before coming back to his senses]] is likely the reason why he's able to let bygones be bygones.

* RedeemingReplacement: Despite starting off as a cruel "caretaker" of the Jyamato as the next Gardener, he eventually decides to takes care of them and seeks to have humanity and Jyamato coexist in peace, completely discarding Archimedel's goal of overthrowing humanity with Jyamato

** Morio and Keiwa are the Riders highlighted in Michinaga's ADayInTheLimelight between #5-#6, and are pitted against each other in the "Catch the Boost" game set up by Michinaga. Both are 2 of the most outwardly cordial Riders who are ready to lend a helping hand towards other players. When their true colors are revealed, though, Keiwa is shown to genuinely care about others regardless of any circumstances, where Morio is a FairWeatherFriend who only cares about those who can benefit him, and turns on those useless to him. Due to this, Keiwa somewhat reminds Michinaga of Tohru and grows a bit of soft spot towards him, while Morio reminds Michinaga of the Riders who left Tohru for dead, and earns his ire enough to purposely eliminate him.
** To Michinaga himself; him and Morio are both willing to do whatever it takes to win, but Michinaga doesn't hide his dislike to his competitors, is regularly honest, and is upfront about his methods to get rid of them, while Morio puts a kindness facade to hide his true colors, is a chronic liar, and uses sneaky tactics like backstabbing others to gain an upper hand.

** As Neon points out, he could have simply wished to have never had his CareerEndingInjury so he’d be back on the road to being a famous basketball player but he was so consumed by his own loathing that he instead wished for the extinction of humanity.

* MaskOfSanity: Kanato is able to project a calm and collected veneer, despite being openly rude and condescending, all while displaying his misanthropic worldview. When that mask slips, it also shows Kanato is more willing to let even his fellow Riders die to justify his hatred for humans.

** Both him and Michinaga are two of the [[{{Jerkass}} rudest]] players in the ''Encounter'' arc, who has a wish of crushing a group, but Michinaga's bloodlust is limited only to Riders, while though he can go through innocent civilians as well, at worst it's a necessary sacrifice [[WellIntentionedExtremist for the greater good]] in his eyes. Kanato, however, expands his terror to the entire humanity, merely wanting give a taste of his misfortune to everyone, without exception. [[spoiler:Michinaga, on a path of redemption, remarks how he's as sour-hearted as ever in Kanato's return.]]
** He's also this to [[spoiler:Keiwa after his FaceHeelTurn, as though both has grown to be apathetic to the world, Keiwa only does what he thinks is necessary to get what he wants and fulfill his happiness, compared to Kanato only wanting to spitefully bring everyone down to his level. Keiwa actively makes an effort to not end up becoming completely like Kanato when he realizes that he's halfway there.]]

* VillainousBreakdown: Undergoes an episode-long breakdown once he realizes he's infected and getting his wish to eradicate humanity foiled, seeing no point in playing the game by the rules. Once this behavior gets him eliminated, his breakdown is fully cemented as he gloats about how he can't wait to see who else will join him. [[spoiler:He gets a more subtle one in #45 when the fight between Ace and Keiwa are resolved peacefully with the world being remade, not like what he wanted.]]

* WeCanRuleTogether: He views the people who share his worldview as fellow "enlightened" misanthropist and would try to convince them to spread misery together with him.
* WeHardlyKnewYe: He lasts for about 4 episodes before he is eliminated. [[spoiler:Even his return in #45 via being recruited by Beroba only lasts for one episode.]]

* EasilyForgiven: Courtesy of Ace teaching Keiwa to hate the sins but not the sinners, this is demonstrated by Keiwa forgiving him after he helps Sara, even though he only did it to observe her lifestyle (of which Keiwa knows too), despite him getting Goddess of Creation knowing how many people were killed, maimed and/or traumatized with the Jyamato Grand Prix, his parasite Jyamato, and assimilating people into his Tree of Knowledge, by virtue of [[FaceHeelTurn Keiwa]] admitting that he himself has done some awful things too.

** To fellow EvilGenius and predecessor as the gardener of the Jyamato, Archimedel. Archimedel's end goal is to have the Jyamato thrive, and is willing to use himself as fodder to help them, in comparison to Daichi's selfish quest for knowledge above all else, eating infant Jyamato for that purpose. During his time as gardener, Archimedel creates various amount of Jyamato with different ranks, with some being sentient enough to replicate humans; Daichi sticks with the basic Pawn Jyamato and gives them enhanced features instead. The difference can also be seen visually by how the Jyamato are grown under their care, as Archimedel grows them in a greenhouse and behaves much like a gardener while Daichi's "gardening" is more like a lab where he experiments on them using technology instead. However, this is turned around in how by the final episode, Daichi wishes for humanity and the Jyamato to coexist in peace, in contrast to Archimedel wanting them to proser at the expense of humanity.

* HazyFeelTurn: He's a manipulative, sadistic, baby-eating sociopath for most of the series. He later settles down via a VillainousBSOD from Keiwa's beatdown and a conversation with Ace. Though he's more willing to aid the heroes, it's largely because he's lost most of his leverage, and his motivation is still focused on his interests in human thought and memory albeit more towards "happiness"; he still finds the likes of Sara's memories to be "simple and boring" even though he wants to understand how people find joy in such average lives. However, he is more than content working in the Jyamato Garden promoting coexistence between Jyamato and humans.

** Keiwa ends up actually working together with him to take down Kekera after the former's HeelFaceTurn, like what Daichi suggested in #42 when he's cornered.
** Despite starting off as someone who only uses the Jyamato for his own ends, including eating the babies to gain their knowledge, in stark contrast to [[DotingParent Archimedel]], not only he ends up becoming as much of a good caretaker as Archimedel was, but he also has a less malicious goal for their sake of wanting the human and Jyamato to co-exist, compared to Archimedel wanting to replace humanity with them.

* RedeemingReplacement: Despite starting off as a cruel "caretaker" of the Jyamato as the next Gardener, he eventually properly takes care of them and proposes a goal to make them prosper without replacing humanity like Archimedel wanted, aiming to have the humanity and Jyamato coexist in peace.
* RedHerring: In spite of some clues that implied he might be the Desastar, ultimately when he's voted out, he was revealed to be not the Desastar.
* RetiredMonster: He decides to put aside his infecting people in favor of observing how people like [[RidiculouslyAverageGuy Keiwa and Sara]] can be happy despite their simple lives, effectively stopping being a threat to people despite not showing remorse for his actions, albeit he acknowledges how horrible he was as someone who sold his soul to the Jyamato when Keiwa thanks him.

* TookALevelInKindness: Against the Jyamato, he goes from someone who wants to use them to further his thirst of knowledge including eating the infants, to someone who takes Archimedel's methods to nourish the Jyamato akin to a daycare.

* ReluctantWarrior: As they're suddenly enlisted in a DeadlyGame, some would refuse to outright fight, particularly if their opponents are their loved ones, such as [[HighSchoolSweethearts Ken and Mao]].
* ScrewThisImOuttaHere: Those who refuse to fight, like Ken and Mao, tries to run away, of which unfortunately, they're detonated for doing so.
* SickeninglySweethearts: Ken and Mao declare their love to each other by refusing to fight each other this way.

* TrappedInVillainy: Some don't want to fight other players, but are forced to do so under threat of being killed themselves. This gets solved by the main cast providing them something else to fight, with Michinaga holding them off without fighting back much, and Daichi sending Himawari Jyamato against them.

* {{Foil}}: Morio and Keiwa are the Riders highlighted in Michinaga's ADayInTheLimelight between #5-#6, and are pitted against each other in the "Catch the Boost" game set up by Michinaga. Both are 2 of the most outwardly cordial Riders who are ready to lend a helping hand towards other players. When their true colors are revealed, though, Keiwa is shown to genuinely care about others regardless of any circumstances, where Morio is a FairWeatherFriend who only cares about those who can benefit him, and turns on those useless to him. Due to this, Keiwa somewhat reminds Michinaga of Tohru and grows a bit of soft spot towards him, while Morio reminds Michinaga of the Riders who left Tohru for dead, and earns his ire enough to purposely eliminate him.

* {{Irony}}: Had he not gone out of his way to attack the other Riders the moment he was infected, [[WinsByDoingAbsolutelyNothing he would've beaten Neon by just 200 points]]. Instead, he comes in dead last and gets eliminated while Neon ends up reaching the final round of the ''Encounter'' season.

* MaskOfSanity: Kanato is able to project a calm and collected veneer, despite being openly rude and condescending, all while hiding his misanthropic worldview. When that mask slips, it also shows Kanato is more willing to let even his fellow Riders die to justify his hatred for humans.

* PetTheDog: He's surprisingly empathetic to people that share his worldview, [[spoiler:like attempting to understand and bond with Keiwa post-FaceHeelTurn over their despair]].

* VillainousBreakdown: Undergoes an episode-long breakdown once he realizes he's infected and getting his wish to eradicate humanity foiled, seeing no point in playing the game by the rules. Once this behavior gets him eliminated, his breakdown is fully cemented as he gloats about how he can't wait to see who else will join him.

* ContrastingSequelMainCharacter: By the Genesis arc he's basically become one of [[Series/KamenRiderGaim Ryoma Sengoku]], being a hammy MadScientist who experiments with plant lifeforms and is obsessed with [[GodhoodSeeker obtaining godhood]]. However, unlike Ryoma, who remained a villain until his demise, Daichi joined the heroes and survived through to the end of the series.

* EasilyForgiven: He got Goddess of Creation knowing how many people were killed, maimed and/or traumatized with the Jyamato Grand Prix, his parasite Jyamato, and assimilating people into his Tree of Knowledge, but Keiwa is content to forgive him after he helps revive Sara, even though he only did it because Ace made him and that Keiwa admitted that he himself has done some awful things too.

** To fellow EvilGenius and predecessor as the gardener of the Jyamato, Archimedel. Archimedel's end goal is to have the Jyamato thrive, and is willing to use himself as fodder to help them, in comparison to Daichi's selfish quest for knowledge above all else, eating infant Jyamato for that purpose. During his time as gardener, Archimedel creates various amount of Jyamato with different ranks, with some being sentient enough to replicate humans; Daichi sticks with the basic Pawn Jyamato and gives them enhanced features instead. The difference can also be seen visually by how the Jyamato are grown under their care, as Archimedel grows them in a greenhouse and behaves much like a gardener while Daichi's "gardening" is more like a lab where he experiments on them using technology instead. However, by the final episode, Daichi's written wish on the ema following his HazyFeelTurn is for humanity and the Jyamato to coexist in peace, and the way he nourishes the Jyamato is more akin to a daycare instead, taking on Archimedel's methods but not his goals.

* HazyFeelTurn: He's a manipulative, sadistic, baby-eating sociopath for most of the series. He later settles down via a VillainousBSOD from Keiwa's beatdown and a conversation with Ace. Though he's more willing to aid the heroes, it's largely because he's lost most of his leverage, and his motivation is still focused on his interests in human thought and memory albeit more towards "happiness"; he still finds the likes of Sara's memories to be "simple and boring" even though he wants to understand how people find joy in such average lives. However, he is more then content working in the Jyamato Garden promoting coexistence between Jyamato and humans.

* {{Irony}}: Though he's not the actual Desastar, his behavior of demoralizing the Riders is practically doing the Desastar's job; it does not go unnoticed by the other players, and they all vote him out when the time comes.

* RetiredMonster: He doesn't seem to feel remorse for any of his crimes, but he decides to stop being evil after taking an interest in Keiwa and Sara, being curious about how happy they can be despite their simple lives.

* StrongAndSkilled: When he becomes the Marrella Jyamato, he gains much greater physical strength and raw power than his Rider form ever afforded him, but he still retains his tactical expertise. In #47, Daichi exploits Kekera's frog-like tendencies and physiology by tricking him into wrapping his tongue around a stone column in order to immobilize him and create an opening.

* TrappedInVillainy: Most don't want to fight other players, but are forced to do so under threat of being killed themselves.

* EasilyForgiven: He got Goddess of Creation knows how many people killed, maimed and/or traumatized with the Jyamato Grand Prix, his parasite Jyamato, and assimilating people into his Tree of Knowledge, but Keiwa is content to forgive him after he helps revive Sara, even though he only did it because Ace made him.

* HazyFeelTurn: He's a manipulative, sadistic, baby-eating sociopath for most of the series. He later settles down via a VillainousBSOD from Keiwa's beatdown and a conversation with Ace. Though he's more willing to aid the heroes, it's largely because he's lost most of his leverage, and his motivation is still focused on his interests in human thought and memory; he still finds the likes of Sara's memories to be "simple and boring" even though he wants to understand how people find joy in such average lives.

* EasilyForgiven: He got Goddess of Creation knows how many people killed, maimed and/or traumatized with both the Jyamato Grand Prix and his parasite Jyamato and tree of knowledge, but Keiwa is content to forgive him after he helps revive Sara, even though he only did it because Ace made him.

* EvilCannotComprehendGood: Keiwa cooking him and the other Riders breakfast is something that he needs to quiz on.

* TheHeavy: For the "Genesis" arc, as he's the one now creating Jyamato and sending them on attacks.

** To fellow EvilGenius and predecessor as the gardener of the Jyamato, Archimedel. Archimedel's end goal is to have the Jyamato thrive, and is willing to use himself as fodder to help them, in comparison to Daichi's selfish quest for knowledge above all else, eating infant Jyamato for that purpose. During his time as gardener, Archimedel creates various amount of Jyamato with different ranks, with some being sentient enough to replicate humans; Daichi sticks with the basic Pawn Jyamato and gives them enhanced features instead. The difference can also be seen visually by how the Jyamato are grown under their care, as Archimedel grows them in a greenhouse and behaves much like a gardener while Daichi's "gardening" is more like a lab where he experiments on them using technology instead. When it comes Daichi on the side of good, one of his written wishes is to have humanity and the Jyamato to coexist in peace and the way he nourishes the Jyamato is more akin to a daycare instead.

** To fellow EvilGenius and predecessor as the gardener of the Jyamato, Archimedel. Archimedel's end goal is to have the Jyamato thrive, and is willing to use himself as fodder to help them, in comparison to Daichi's selfish quest for knowledge above all else, eating infant Jyamato for that purpose. During his time as gardener, Archimedel creates various amount of Jyamato with different ranks, with some being sentient enough to replicate humans; Daichi sticks with the basic Pawn Jyamato and gives them enhanced features instead. The difference can also be seen visually by how the Jyamato are grown under their care, as Archimedel grows them in a greenhouse and behaves much like a gardener while Daichi's "gardening" is more like a lab where he experiments on them using technology instead.

* ContrastingSequelMainCharacter: By the Genesis arc he's basically become one of [[Series/KamenRiderGaim Ryoma Sengoku]], being a hammy MadScientist who experiments with plant lifeforms and is obsessed with [[GodhoodSeeker obtaining godhood]]. However, unlike Ryoma, who remained a villain until his demise, Daichi had somehow turned to the heroes' side and survived in the end.

* AmbigiousSituation: Unlike with Kirito, we don't know if he was one of the deceased DGP Riders brought back by Keiwa's wish and [[AllThereInTheManual the synopsis for his appearence]] only notes that he [[https://www.kamen-rider-official.com/geats/45/ was a DGP participant who left the scene]].

* WhatHappenedToTheMouse: He gets knocked out and loses his Rider transformation, but we don't see what happens to him afterwards. Ace resetting the world means that he's likely gone back to being dead.

* ContrastingSequelMainCharacter: By the Genesis arc he's basically become one of [[Series/KamenRiderGaim Ryoma Sengoku]], being a hammy MadScientist who experiments with plant lifeforms and is obsessed with [[GodhoodSeeker obtaining godhood]]. However, unlike Ryoma, who remained a villain until his demise, Daichi had somehow turned to the heroes' side.

* {{Expy}}: By the Genesis arc he's basically become one of [[Series/KamenRiderGaim Ryoma Sengoku]], being a hammy MadScientist who experiments with plant lifeforms and is obsessed with [[GodhoodSeeker obtaining godhood]].

** In the ''Genesis'' arc, he sets up a plot with Kekera, Jitto, and Beroba to get Sara killed via parasitic Jyamato at Michinaga's hands as revenge towards ''both'' of them. However, this backfires terribly for him as Keiwa, fresh from getting his revenge on Michinaga, sets his sights on him and curbstomps him, with all three of his partners not interested in helping for their own personal reasons, all of which Daichi caused.[[note]]Jitto was busy turning Tsumuri into a Goddess thanks to a deal he made with Keiwa, Beroba already got what she wanted with Michinaga's suffering, and Kekera was simply there to watch Keiwa complete his vengence arc.[[/note]] This leaves him to take the full brunt of the assault and, once Keiwa resets the world, he loses the progress he had made with his parasitic Jyamato.

* NotSoStoic: For all his apathetic behavior, seeing the Dunkleosteus Jyamato '''''DEVOUR''''' Archimedel is enough to make him look like he's about to vomit. Though, once all that was said and done, he doesn't mind eating Jyamato himself.

* EnemyMine: He tries to assure mutual benefits for both parties in a deal whenever he can, but when he has the leverage for it, he usually tries to set up his partner to take the fall so that he's the only one to reap the rewards. When he's on the back foot, though, he often tries to use this tendency to get the other person to spare him. Late in the ''Genesis'' arc, the Riders wind up approaching ''him'' instead: they demand that he engineers a way to free Sara and the other victims from his Tree of Knowledge, and he agrees to work with them to get the Tree back.
* EvenEvilHasStandards: For all his apathetic behaviors make him appear, he does '''''NOT''''' react well to seeing the Dunkleosteus Jyamato '''''DEVOUR''''' Archimedel. He seemingly gets over it after it's done, but looked somewhere between vomiting and passing out when it ''was'' happening. Though, once all that was said and done, he doesn't mind eating Jyamato himself.