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This is a partial character sheet for Kamen Rider Den-O. Visit here for the main character index. Subjective trope and audience reactions should go on the YMMV page.

Jikan no nami wo tsukamaete! (Hold on to the waves of time!)
Ima sugu ni yukou yakusoku no basho. (Let's go right away to the promised place.)
Genkai mugen, iza tobikome! (Limits are infinite, now jump into it!)
Climax Jump!
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DenLiner Crew

    Ryotaro Nogami/Kamen Rider Den-O 

Ryotaro Nogami/Kamen Rider Den-O

Portrayed by Takeru Satoh and Takuya Mizoguchi

https://static.tvtropes.org/pmwiki/pub/images/ryotaronogami.png
"I don't have any energy left to faint!"
The protagonist and eponymous Kamen Rider, Ryotaro is quite possibly the unluckiest being on Earth (and a high school drop-out supporting his only other family member, his older sister Airi); every day is a parade of misfortune for him. In the middle of an unusually bad day, he's possessed by a time-travelling monster called an Imagin, meets a strange girl who tells him he's a Singularity Point, and said girl and Imagin effectively "railroad" him into becoming Den-O. Even though by his own admission he's not exceptionally strong, smart, or brave, when the chips are down his true strength appears in the form of unstoppable determination. In a way, his horrid luck could be seen as a mixed blessing, since he's been through so much that it takes a lot to really faze or hurt him. He's also very good at reading people's emotions and true feelings; Ryotaro's ultimate strength may lie in his unflappable kindness. As the series went on, he started to develop self-confidence, assertion, strength, and bravery, eventually being able to show himself as an independent person and a worthy hero.
  • Calling Your Attacks: Hissatsu Waza!...um...Densha Giri! note  The crew's reaction?
    The Crew: Your naming sense is terrible!
  • Catchphrase: "Let's go, Everyone!" note  settled in after he gained Liner Form.
  • Classical Anti-Hero: Incredibly clumsy, weak and unlucky, with his saving grace being strong morals and an absolute refusal to compromise them.
  • Cool Sword: DenGasher Sword Mode (used a couple of times in Plat Form and once in Liner Form in Final Countdown when he lost the DenKamen Sword).
  • Cosmic Plaything: After seeing the scene where he's whacked in the face with progressively larger balls (as in sports equipment), can you really call him anything else?
  • Cowardly Lion: He's very afraid the few times he's forced to fight, but he stays anyway because he knows what would happen if he runs.
  • Determinator: Ryotaro's a pushover, but when he wants something, no matter how much you beat him down, he'll keep getting up to get it.
  • Face–Heel Turn: Forced to do so by Yu-Ki in Final Countdown but is later rescued.
  • Finishing Move: Liner Form's Train Slash (Densha Giri), which has five variations, four of which depends on the DenKamen Sword's setting:
    • Momo-Sword Mode: DenKamen Slash note 
    • Ura-Rod Mode: DenKamen Attack note 
    • Kin-Ax Mode: DenKamen Chop note 
    • Ryu-Gun Mode: DenKamen Shot note 
    • Full Throttle Break: Activated by spinning the turntable one full circle. During the attack, DenLiners Gouka, Isurugi, Rekkou and Ikazuchi flank on different sides of Den-O.
  • Fragile Speedster: Liner Form.
  • The Heart: He's the most kindhearted of the main cast and constantly tries to keep the Taros from hurting others in their bouts of selfishness; this goes from taking issue with Momotaros stealing or demanding money in the first few episodes to claiming it's his responsibility to keep Ryutaros in line and even getting him to apologize for something late in the series.
  • Honor Before Reason: In an early episode, Ryotaro becomes angry with Momotaros for (unwittingly) aiding a robber. Later on he refuses to let Momo fight until he apologizes and promises never to let anything like it happen again. He does this in the middle of a battle where the Imagin is beating him senseless.
  • Identity Impersonator: During the final arc, while stranded in the past, Ryotaro impersonates himself in order to find out the secret of his family from his sister.
  • In the Style of...: In addition to singing in all five standard versions of Double-Action, he gains a solo, Rock 'n Roll theme called Real-Action about the same time he gains Liner Form.
  • Joke Character: Plat Formnote .
  • Locked Out of the Loop: The fact that he's a Singularity Point plays a major role in Sakurai and Airi's plans, which Ryotaro himself doesn't learn until the next-to-last episode, and only then by deceiving a past version of Airi.
  • Many Spirits Inside of One: In his Climax and Super Climax Forms.
  • Masculine Girl, Feminine Boy: Feminine Boy to Hana's Masculine Girl.
  • Meaningful Name: "Ryotaro" means "good boy".
  • The Nth Doctor: After Takeru Satoh left the cast following the third movie, Takuya Mizoguchi (who played 11-year-old Ryotaro in the first) took over the role in the fourth with a Hand Wave about how changes to the past do this sort of thing all the time.
  • Parental Abandonment: Ryotaro's parents died when he was young, leaving his sister and grandmother to raise him.
  • The Pollyanna: A rare male version.
  • Powers via Possession: How Ryotaro is able to access most of Den-O's forms.
  • Raised by Grandparents: He used to live his grandmother when he was young, as mentioned in Ore, Tanjou!
  • Ripple Effect-Proof Memory: One of the defining characteristics of a Singularity Point. However, a Plot Hole opened when it was revealed in the finale that Sakurai and Airi's plan erased his memory of their daughter in the past. It was one of Sakurai's cards that erased his memory, but he regained it, for the most part, upon meeting Yuto.
  • Running Gag: Ryotaro will always...
  • Sensitive Guy and Manly Man: Sensitive Guy to Yuto's Manly Man.
  • Shrinking Violet: Ryotaro during the beginning of the series was a cowardly type and usually shy.
  • Skunk Stripe: Whenever an Imagin possesses him, he gets a different color streak in his hair.
  • Super Mode: Liner Form, where he gains a special BFS that has the powers of ALL the Taros, and can even summon the Den Liner to aid in his own unique Finishing Move.
    • Played with in that stats reveal that it's actually weaker than other forms in some regards, and he's still a novice fighter in the form.
  • Swiss Army Weapon: DenKamen Sword; like the DenGasher, it can emulate whatever Den-O weapon the Liner Form is imitating.
  • This Loser Is You: He starts out a loser because of his terrible luck and his tendency for being timid, but gets better as he gains more self confidence and determination.
  • Time-Shifted Actor: Aside from Takeru Sato and Takuya Mizoguchi's meeting in the first movie, the ending of the third movie shows Kotaro arriving in his timeline, and meeting up with Ryotaro as an old man (who was only seen from the back).
  • Took a Level in Badass: After he achieves Liner Form, he comes over as much more serious and determined than at the start of the series.
  • You Gotta Have Blue Hair: Any possession by an Imagin changes his hairstyle and adds a touch of color. This even applies when possessed by the evil Ghost Imagin in Final Countdown, turning his hair entirely white.
    Hana 

Hana Sakurai/Kohana

Portrayed by Yuriko Shiratori/Tamaki Matsumoto

https://static.tvtropes.org/pmwiki/pub/images/hana_7.png
https://static.tvtropes.org/pmwiki/pub/images/kohana.png
As Kohana
"I can't allow that. I won't let you Imagin kill Den-O."
The mysterious young woman who drags Ryotaro into the battle with the Imagin, providing him with the Den-O Belt and DenLiner. Hana is the only survivor of a future timeline wiped out by the Imagin, saved only by the fact that she's a Singularity Point like Ryotaro. Because of this, she has a strong dedication to protecting the timeline and a fierce hatred for Imagin, a stance which gradually changes as she interacts with the Taros. She helps Ryotaro investigate the Imagin, and works to keep the Taros in line, usually berating (or Dope Punching) Momo for being violent or Ura for chasing skirt. As a new connection to Hana's destroyed time forms, she finds herself de-aged into a ten-year-old whom Ryotaro nicknames Kohana (literally "Little Hana") and tries to pass off as Hana's little sister to Muggles. Her true nature and her relationship to the strange happenings around Ryotaro is revealed late in the series.
  • Action Girl: In a case different from the role of most female leads in Kamen Rider, she actually accomplishes things throughout the show, and isn't even afraid of taking on numerous martial artists at once in a fight. It also helps that she has an unusually powerful punch for someone of her frame.
  • Badass Adorable: Being turned into a cute little girl does not decrease her physical strength one bit.
  • Badass Normal: Powerful enough to knock the Taros out.
  • Barrier Maiden: As the Junction Point.
  • Cool Big Sis: Treats Ryotaro this way before being de-aged, although she's still pretty cool and mature in spirit even after that.
  • Dope Slap: A master of this trope. Her punches are what help mellow Sieg's arrogant Jerkass-ness.
  • Kid from the Future: She's the daughter of Airi and Sakurai.
  • Mama Bear: She is fiercely protective of Ryotaro and often goes out of her way to make sure he is alright. This becomes a bit ironic when she turns out to be his niece.
  • Masculine Girl, Feminine Boy: Masculine Girl to Ryotaro's Feminine Boy.
  • Megaton Punch: Gets even more impressive when she becomes Kohana and suffers no drop in power.
  • The Nth Doctor: Tamaki Matsumoto for Yuriko Shiratori, which is explained in-series as Hana de-aging from a distortion in time. Shiratori left the series due to the stresses of filming.
  • Perpetual Frowner: When played by Yuriko Shiratori. Not so much when Tamaki Matsumoto took over.
  • Pretending to Be One's Own Relative: Hana is regressed from an adult to a ten year old child as a result of massive shifts to her timeline and thereafter passes as 'Kohana', her younger sister.
  • Small Girl, Big Gun: Wields a bazooka as her Weapon of Choice in Climax Deka.
  • Super Strength: Played mainly for laughs whenever she abuses the Imagin, to the point where they're all afraid of her.
  • Team Mom: A much less gentle version of this trope, but Hana is the member of the team that keeps all the Imagin in line and worries the most about Ryotaro's health. If not for her, hardly anything would get done.
  • Token Mini-Moe: As Kohana.
  • Tomboy and Girly Girl: Tomboy to Naomi's Girly Girl.
  • Tsundere: For the Imagin; normally she makes it very clear how much she hates Imagin and routinely beats up the four Taros for how they treat Ryotaro, but she does care about them deep down. She even cried when Ura, Kin, and Ryu seemingly vanished.
  • Unlimited Wardrobe: Every time she steps off the DenLiner, she wears a different outfit.
  • Waif-Fu: Exhibited more as Kohana.
    Naomi 

Naomi

Portrayed by Rina Akiyama

https://static.tvtropes.org/pmwiki/pub/images/naomi_91.png
"Thank you for boarding the Denliner today.Your attendant today is...Me! Naomi!"
The DenLiner's waitress/stewardess, Naomi runs the dining car and serves coffee to the Den-O team. She's energetic and unflappable, sticking to her philosophy of only making coffee. She's great friends with the Imagin, often playing with Ryutaros; it was Naomi who named him in the first place. Despite appearing to be little more than a ditzy waitress, Naomi is a fixture of the DenLiner and has demonstrated resourcefulness and resolve when things look bad.
  • Big Damn Heroes: Rescues Kintaros and Urataros in the past, and brings them alongside Sieg to the present for the final battle.
  • Cordon Bleugh Chef: She puts salt, pepper, flour, and wasabi in her coffee. The only people who like it are the Imagin. However, this status only applies to her coffee; the food she makes is excellent, if sometimes a bit excessive in volume.
    • Oddly, during one episode where Naomi was taking care of Airi's shop, she took a taste of Airi's coffee and had the same reaction people other than the Taros have with her coffee. Kinda calls into question her tastes.
  • Genki Girl: Usually seen with lots of energy and a smile on her face.
  • In the Style of...: Double-Action Coffee Form, along with Airi = Light Pop.
  • Painted-On Pants: With arrows.
  • The Pollyanna: Hardly seen without her smile.
  • Tomboy and Girly Girl: Girly Girl to Hana's Tomboy.
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    Owner 

The Owner

Portrayed by Kenjiro Ishimaru

https://static.tvtropes.org/pmwiki/pub/images/owner_5.png
The mysterious man who operates the DenLiner and works with Hana to protect the timeline. He occasionally imparts cryptic information to Ryotaro, but is primarily concerned with the safety of the DenLiner and its passengers, leaving the Imagin to Den-O. Mostly laid-back, he can be harsh towards those who break the train's rules, bother his passengers, or attempt to disrupt time. His "hobby" is eating piled foods (such as rice, flan, or pudding) with a flag on top, attempting to take as many bites as possible before the flag falls. Later in the series the cast meets the Station Master who runs the KingLiner and is the Owner's rival in the food-flag "game".
  • Berserk Button: Mess with the rules of the DenLiner and the normally mellow Owner might slap you with a Denial of Passage ticket.
  • Big Good: He's the owner of the DenLiner and thus decides who can and cannot ride on it, based on whether they have a ticket and if they're obeying the rules. Although he says even he doesn't know everything about time, he certainly knows the most of the main cast and the characters usually go to him if there's a problem they don't understand.
  • Eccentric Mentor: Eccentric is an understatement for someone whose only concern in life is beating the Station Master at their food-based competitions (or making sure that the flag in the food he's eating doesn't fall.) Despite this he's the one who teaches Ryotaro and Hana the most about the oddities of time.
  • Everyone Calls Him "Barkeep": The Owner and the Station Master have no names other than their job titles.
  • Identical Stranger: The Owner and the Station Master, who both look exactly alike save for the Station Master always smiling. They insist it's just your imagination.
  • Inexplicably Awesome: He displays some strange supernatural abilities, such as destroying an electrically charged cell with a paper flag, having immunity to Ryutaros' mind control and running so fast he can keep up with the Den-Liner! The character himself receives no backstory whatsoever.
  • Running Gag: Because of the above trope, characters who meet both the Owner and Station Master at the same time actually confuse them for twins.
  • Serious Business: Food Flags toppling over before he finishes his food.
  • Twin Switch: It's not clear if he's actually twins with the identical Station Master, but in Onigashima Battleship they pull this while "giving" the Oni the DenLiner so they won't realize that the Owner never actually left the train.
    Momotaros 

Momotaros/Kamen Rider Den-O Sword Form

Voiced by Toshihiko Seki; suit actor Seiji Takaiwa

https://static.tvtropes.org/pmwiki/pub/images/momotaros_2.png
https://static.tvtropes.org/pmwiki/pub/images/m_ryotaro.png
M-Ryotaro
https://static.tvtropes.org/pmwiki/pub/images/krd_den_o_7.png
Den-O Sword Form
"I...have arrived!"
The first Imagin to possess Ryotaro, he resembles the red oni from the legend of Momotaro, and his abilities (including those as Den-O Sword Form) are drawn from the same story. Hot-Blooded and hot-headed, Momotaros is always spoiling for a fight whether with enemy Imagin or with whomever happens to tick him off at the moment. Initially annoyed when he realized he possessed a Singularity Point, the then-unnamed Imagin sided with Ryotaro when they were attacked by the Bat Imagin on the basis that if Ryotaro died, so did he. After the battle, Ryotaro gave the red oni-esque Imagin the name "Momotaros" after the legend of Momotaro the Peach Boy. While a brash Boisterous Bruiser might seem at odds with Ryotaro's normal personality, it's his eccentricies like posing, pre-battle speeches and calling his attacks that makes Den-O resemble more traditional Kamen Riders. Despite his rough attitude, Momotaros is fiercely loyal to his teammates, and seeks to improve Ryotaro by toughening him up and improving his "bad taste".
  • Anime Hair: A side effect on people possessed by him; their hair stands straight up and has a red streak.
  • BFS: MomoSword.
  • Big Brother Instinct: Eventually develops one for Ryotaro as well as the other Taros, like making sure to get the Anthopper Imagins back for beating up Ryutaros. He even takes it personally when he thought Ura was Evil All Along (he wasn't).
  • Blood Knight: Has elements of it at the start, before developing into a Boisterous Bruiser; at first all he wants is to fight, no matter who he's fighting or if they deserved it.
  • Butt-Monkey: Ryotaro's luck seems to have rubbed off on him, as he's usually the butt of jokes and the biggest source of the series' physical comedy. This is exemplified in the fourth movie; where he's literally shot in the ass with an arrow.
  • Brain Bleach: His reaction to learning that Deneb used Urataros' bath water in the broth that Deneb was serving to the crew. Can't really blame Momo. Still, it was just a joke by Naomi.
  • Calling Your Attacks: "Hissatsu! My finishing attack...Part (number/____Version)!"
  • Catchphrase:
    • "Ore, sanjou!" English 
    • "From start to finish, I'm always at a climax!" Japanese 
    • "Let's go, go, go!!" Japanese 
  • Character Tics: Tends to do bombastic poses, most famously the "Ore, sanjou!" pose which consist of pointing at himself on the Ore, then standing with his arms spread at sanjou!. Also, keeping his blade on his shoulder when he's Den-O.
  • Cool Sword: DenGasher Sword Mode.
  • Critical Research Failure: In-universe, Played for Laughs.
    Momo: It's Mt. Fuji!
    Hana: What are you saying? That's not Mt. Fuji, that's a pyramid!
  • Deuteragonist: Being the first Imagin and being the exact opposite of the protagonist, he gets the most focus.
  • Fish out of Temporal Water: Twice in the Cho Den-O series:
    • In Onigashima Battleship, while the other Taros were also stranded (in the 30's-40's), they manage to stay together, but Momo, all alone, gets stuck in the distant past, in the very period where the Oni were waging their war against the humans.
    • In Episode Red, he gets thrown overboard when the DenLiner was out of control, getting stranded four months before the events of the movie. He gets taken in and nursed back to health by kindly homeless people.
  • Four Is Death: Lampshades it when Ryotaro points out that he skipped over number 4 in his attack-calling; Momo claims that he did it because it's cool to skip four, then proceeds to count to ten, jumping from three to five.
  • Finishing Move:
    • Extreme Slash
    • DenRider Kick: A Hurricane Kick. First used in the fourth movie.
  • Hot-Blooded: He's basically a Stock Shōnen Hero in the form of an oni.
  • Idiot Hair: The strand of red hair when possessing Ryotaro literally stands out.
  • Idiot Hero: Lampshaded through a Gilligan Cut by Kamen Rider Decade.
  • "I Know You're in There Somewhere" Fight: in Final Countdown, to Ryotaro/Yu-ki Skull Form, as he's been possessed by the powerful Ghost Imagin and can't control what he's doing.
  • Incoming Ham: Whenever he proclaims that he's arrived, which he does in the most dramatic way possible.
  • In the Name of the Moon: Either of Momo's catchphrases suffices.
  • In the Style of...: The original Double-Action (nicknamed Sword Form to avoid confusion) = Eurobeat. Climax Jump Sword Form = Hard Rock.
  • Jack-of-All-Stats: When in Sword Form possessing Ryotaro.
  • Jerk with a Heart of Gold: He's rough around the edges towards Ryotaro at first and continues to bicker among the other Taros, but he still cares a lot about all of them. Even in the second two-parter he shows his good side after apologizing to Ryotaro for taking other people's money while in his body.
  • The Lancer: Ryotaro's personality foil, his most frequent partner in battle, and closest to him among the Taros.
  • Large Ham: Enjoys doing bombastic poses and being flashy in battle.
  • Literal Asskicking: He's fond of doing this to his opponents, whether it involves his actual feet or even his sword.
  • The Nicknamer: Even moreso than the rest of the cast. He calls Urataros "Kame" (Turtle), Kintaros "Kuma" (Bear), Ryutaros "Kozo" (Brat) or "Hanatare Kozo" (Snot-Nosed Brat), Hana "Hanakuso Onna" (Nosy Woman), Sieg "Chicken Wings", Deneb "Odebu" (Tubby) and Teddy "Tendon". He also has a habit of tacking "Yaro" (a rude version of "you", usually rendered as "Jerk" or "Bastard") onto the end of most of his nicknames; in fact, he only refers to enemy Imagin by their species and with "Yaro" tacked on the end, as in "Mogura Yaro" (Mole Jerk)
  • Red Eyes, Take Warning: People possessed by Imagin have their eyes change color to match; Momo, obviously, makes them go red.
  • Red Oni, Blue Oni: The red to Urataros' blue.
  • Rule of Cool: What Momo usually tries to go by. His poses and catchphrases aren't exactly necessary in battle, but he insists on them.
  • Running Gag: Being mistaken for an Oni. It doesn't help that he was designed that way.
  • Scarf of Asskicking: People possessed by Momo, especially in his Decade appearances, gain one in addition to red eyes and a spiky hair with a single red streak.
  • Small Name, Big Ego: Played for laughs in the Imagin Anime spin-offs, going so far as to try to make himself Toei's mascot, then throwing a fit when he spots the HeartCatch Pretty Cure! poster nearby.
  • Spotlight-Stealing Squad: After the Yellow movie, Ryotaro wasn't seen in KR until his glorious return in Zi-O. For every future appearance of Den-O, Momotaros took the lead as the main man and voice of Sword Form.
  • Super Drowning Skills: He can't swim.
  • Trademark Favorite Food: Pudding. He even starts up a pudding shop in Imagin Anime.
  • Translation Convention: Momo's catchphrase "Ore, sanjou!" is a rough way of saying "I have arrived!" (fitting for the Train-themed rider), "Here I am!", or "Here I come!", but most fans just leave it in Japanese because there's no translation that sounds quite right.
  • Heroes Prefer Swords: Being the first Imagin to bond with Ryotaro and the one used most often, he's the "sword form" for Den O and fittingly has a sword of his own.
  • We Want Our Jerk Back: The whole "Gold Gentleman Coffee" incident; Ura was so weirded out that he prefers the old Momo over the gentlemanly one.
  • Why Did It Have to Be Snakes?: Is afraid of dogs.
  • Wolverine Publicity: Momotaros has the most screentime out of any of the Imagin, which becomes especially noticeable in the movies—in fact, Momotaros occasionally gets more screentime than Ryotaro, becoming Den O Sword Form without him. He is of course the most merchandisable character in the series.
    Urataros 

Urataros/Kamen Rider Den-O Rod Form

Voiced by Koji Yusa; suit actor Eitoku

https://static.tvtropes.org/pmwiki/pub/images/den_o_urataros.jpg
https://static.tvtropes.org/pmwiki/pub/images/u_ryotaro.png
U-Ryotaro
https://static.tvtropes.org/pmwiki/pub/images/krdo_rod.png
Den-O Rod Form
"Mind if I reel you in?"
The second Imagin to possess Ryotaro, his appearance and abilities (both as himself and Den-O Rod Form) come from Ryotaro's mental image of the myth of Urashima Taro who rescues a magic turtle who later takes him to the court of Ryujin, the dragon god of the sea. In stark contrast to the fight-happy Momotaros, Urataros is laid-back, non-confrontational, and clever. A Consummate Liar, Ura can talk anyone into just about anything; since he's an enthusiastic skirt-chaser, he can often be found using his talent to charm the socks off of any cute girls he meets while possessing Ryotaro. He was aware that Ryotaro was a Singularity Point, and willingly possessed him in the hopes of extending his lifespan and meeting women. Because of his non-confrontational nature, Rod Form is the least used of Den-O's forms, but Ura's skills come in handy when they need to gather information about a rogue Imagin - that is, provided Hana can keep his mind on the task at hand...
  • Animal Motifs: Turtle. He even thinks it's personal when another turtle-based Imagin appears to steal his limelight.
  • Armed Legs: Climax Form's Kick Mode.
  • Blade on a Stick: DenGasher Rod Mode. It also doubles as a fishing rod.
  • Busman's Vocabulary: He constantly speaks in fishing metaphors.
  • Catchphrase: "Mind if I reel you in?" Japanese 
  • Character Tics: Holds his left hand near his face, as if he's holding something.
  • Chivalrous Pervert: He lies constantly, especially to women, but he also refuses to hurt women in battle and seems to view his lying behavior as helping to give them a better time more than anything.
  • Consummate Liar: In addition to his own skills, he claims his goal is to teach Ryotaro to be a better liar.
  • Double Weapon: UrataRod.
  • Fake Defector: Pulls this off in the final story arc. He pulls it off really well, too, thanks to his nature.
  • Finishing Move: Solid Attack, followed by DenRider Kick.
  • Guile Hero: A liar and a trickster, but still has a good heart.
  • In the Style of...: Double-Action Rod Form and Climax Jump Rod Form = Ska.
  • The Nicknamer: Calls Momotaros "Sempai" (because Momo insisted) and refers to most people affectionately ("Kin-chan", "Naomi-chan") unless they've earned his respect ("Hana-san", "Airi-san"). He calls Yuto "Boku-chan" (a very childish way of saying "me") as a reference to the young man's selfish nature.
  • Red Oni, Blue Oni: The blue to Momotaros' red.
  • Sexy Man, Instant Harem: He was able to woo all of the nurses while in the hospital, and him walking into the carnival gets all the girls to squeal and rush toward him.
  • The Smart Guy: He is non-confrontational, does not want to fight more than necessary, can talk his way out of any tricky situation and is the go-to guy for gathering information.
  • Spit Take: Gave a particularly infamous one when Ryotaro decided to have another Imagin join the team. It's particularly of note because his character suit doesn't have an articulate jaw.
  • Stoic Spectacles: People possessed by him gain these in addition to the blue eyes and streak in their hair.
  • Stone Wall: His fighting style is the most defensive out of all the Taros.
  • Super Not-Drowning Skills: As opposed to Momotaros. Justified that he's based on a turtle, who are good swimmers.
    Kintaros 

Kintaros/Kamen Rider Den-O Ax Form

Voiced by Masaki Terasoma; suit actor Jiro Okamoto

https://static.tvtropes.org/pmwiki/pub/images/kintaros_7.png
https://static.tvtropes.org/pmwiki/pub/images/k_ryotaro.png
K-Ryotaro
https://static.tvtropes.org/pmwiki/pub/images/krdo_ax.png
Den-O Ax Form
"My strength has made you cry!"
The third Imagin to possess Ryotaro, inspired by the legend of Kintaro who would sumo wrestle bears, which also extends to Den-O Ax Form. Initially contracted to a sickly martial artist named Masaru Honjou, whose wish to achieve the "ultimate karate". Much to Ryotaro and Hana's surprise, the Imagin actually stuck to the contract, training Honjou's body while in control and showing no interest in disrupting time. Ryotaro recognizes his nobility after he's mortally wounded protecting Honjou from the Rhino Imagin and offers a contract in order to save his life. The strong, silent Kintaros usually sleeps the day away until someone presses his button by saying the word "Nakeru" (Japanese for "cry")...or anything even remotely sounding like "Nakeru", which causes him to possess Ryotaro instantly, unceremoniously booting out anyone already possessing him. Out of all the Taros, Kin is the nicest and friendliest, showing an uncharacteristic amount of real emotion for an Imagin.
  • Animal Motifs: Bear.
  • The Big Guy: He's considered to be physically the strongest in the group, as he's constantly breaking things by accident, and specializes in being a heavy-hitter.
  • Benevolent Genie: Unlike near every other Imagin in the series, Kintaros not only upheld the spirit of Honjou's wish, as opposed to the letter, he only completed the contract early in order to go back in time and protect him from the Rhino Imagin.
  • Berserk Button: DON'T EVER make a girl cry.
  • Boisterous Bruiser: Not violent like Momo, but still loves a good fight.
  • Calling Your Attacks: In an odd variation, he only says the name of his Finishing Move after performing it, which Ryotaro specifically notes the first time he does it.
  • Catchphrase: "My strength has made you cry. Wipe your tears with this!" Japanese  Sometimes shortened to just "My strength has made you cry!" or just "You cried!" Japanese 
  • Character Tics: Pops his neck by pushing a hand (or sometimes a finger) against his chin. The Badass Arm-Fold is his default pose.
  • Cherry Blossoms: Parodied, as occasionally the transformation into Ax Form will be accompanied by fluttering...tissues. "Wipe your tears", indeed.
  • The Ditz: You have to wonder about the sort of person who mistakes Sumo for Karate and doesn't realize what he's done until children explain it to him.
  • Does Not Know His Own Strength: He isn't built for normal human behavior. Coupled with Ryotaro's already bad luck, and accidental collateral damage is common.
  • Everyone Has Standards: In his introductory episode, Kintaros is willing to fight anyone who stands in his way, but he will not cause collateral damage or hurt women. Plus, he was willing to catch criminals for the police in the following episode.
  • Finishing Move: Dynamic Chop.
  • Gentle Giant: The Taros with the most bulk, and the biggest heart.
  • Hammerspace: He can pull tissues out of thin air, apparently.
  • Heavy Sleeper: And narcoleptic to boot; since he's a bear, this presumably represents hibernation. The only way to wake him up is by activating his Berserk Button.
  • Honor Before Reason: Demonstrated in his A Day in the Limelight two-parter where he puts aside fighting the Monster of the Week in order to prove to a young girl that she's wrong in thinking her father hates her, and he's willing to be kicked off the DenLiner in order to prove it. Thankfully, he's right about the father, and the changes Kintaros caused mean the Imagin never became a threat, so the Owner let him stay.
  • Implausible Deniability: When the Owner once said that Kintaros' snoring is a problem, Kintaros wakes up just to deny it.
  • In the Style of...: Double-Action Ax Form and Climax Jump Ax Form = Enka.
  • Kansai Regional Accent: He speaks in the Kansai dialect, given that his actor Masaki Terasoma grew up in Osaka.
  • The Klutz: Seen moreso when he's possessing Honjo and Ryotaro than in his natural form.
  • Manly Tears: His catchphrase is "You'll cry!", and he tends to shed said tears whenever Ryotaro (or anyone else, for that matter) displays any kind of notable strength or determination.
  • Mighty Glacier: He relies on his toughness instead of speed in battle.
  • The Nicknamer: Calls Momotaros "Momonoji" (Peach), sometimes mispronouncing it as "Momonga" (Flying Squirrel) or "Momohiki" (Long Underwear); calls Urataros "Kamenoji" (Turtle). Note that the -oji suffix actually refers to them as "sir" in the sense of an old man in the same way that Urataros refers to Momotaros as "-sempai".
  • Noble Demon: The only one of the Taros to not start off as a Villain Protagonist.
  • Noodle Incident: Destroying the DenLiner's bathtub, causing Urataros to be swept away. It actually happened in-series (mentioned in passing as a background discussion), but we never see the details on-screen.
  • To Be a Master: His desire to be the strongest warrior presumably comes from his original contractor Honjo.
  • Weapon of Choice: The Den-Gasher's Axe Mode.
    Ryutaros 

Ryutaros/Kamen Rider Den-O Gun Form

Voiced by Kenichi Suzumura; suit actor Toshihiro Ogura

https://static.tvtropes.org/pmwiki/pub/images/den_o_ryuutaros2.jpg
https://static.tvtropes.org/pmwiki/pub/images/r_ryotaro.png
R-Ryotaro
https://static.tvtropes.org/pmwiki/pub/images/krdo_gun.png
Den-O Gun Form
"Mind if I defeat you? I can't hear your answer!"
The fourth Imagin to possess Ryotaro and the last member of the "Taros", making up the core team; unlike the others, there is no mythical "Ryutaro" on which he was based, and is instead formed from Ryotaro's mental image of dragons. Appearing last, he was actually the second to possess Ryotaro, as revealed in flashbacks to Urataros' debut episode, and subsequently buried himself deep in Ryotaro's psyche, only being revealed during a hypnosis session instigated by Miura. At first he wants to kill Ryotaro, having been given an unrevokable Liner Pass and told that he can take over the DenLiner if he destroys Den-O. However, he falls in love with Airi and abandons his mission when the others point out that killing her brother would upset her. Childish and willful, Ryuta is the strongest of the Taros, and usually can't be "booted" from Ryotaro's body unless Momo, Ura, and Kin work together. His brash attitude causes a lot of problems normally and in battle as Gun Form, causing lots of collateral damage. He loves animals and dancing, and has the power to make people dance with him by snapping his fingers. His crush on Airi and bad advice from Kintaros caused him to develop a jealous hatred towards Yuto, which causes even more problems.
  • Animal Motifs: Dragon
  • BFG: Ryuvolver.
  • Break the Cutie: In episodes 37-38, Ryutaros gets confronted by Kai who tricked Ryutaros into almost destroying DenLiner, and at the same time, made him give up on his crush on Airi after she realizes that a Ryutaros-possessed-Ryotaro isn't really her brother. Made all the worse because Ryutaros was trying to give Airi a picture he made of her and couldn't; the end of the episode has him smoothing it out as he cries away from the others. Poor guy.
  • Catchphrase: "Mind if I (something)?", most commonly "beat you" or "end it", followed by "Can't hear the answer!" Japanese 
  • Character Tics: Spinning around during his Catchphrase, followed by Giving Someone the Pointer Finger.
  • Cheshire Cat Grin: If he possessed Ryotaro and he holds a grin, RUN. If you don't, then there is a chance that he is going to chase you down with his dance posse and will not stop until he catches you!
  • Crazy Jealous Guy: He adores Airi and gets upset whenever Yuto is involved.
  • Crowd Song: A rare justified version since he can force other people to dance with him, in the process making them his minions. Sometimes he uses dances to chase people down.
  • Cuteness Proximity: He loves cute little animals, sometimes possessing Ryotaro just to pick up an animal and cuddle them.
  • Dance Battler: When fighting, he moves around as if dancing.
  • Destructive Savior: He means well, but let's just say his aim is terrible.
  • Dragon Rider: When Ryuta drives the DenLiner, he controls it from on top of the Ikazuchi (Car #7)'s dragon head, rather than the cockpit in Gouka (Car #1) as the other three Taros do.
  • Finishing Move: Wild Shot.
  • Friend to All Living Things: He loves all types of animals, particularly kittens, puppies and birds.
  • Funny Background Event: He's pretty much a walking one. No matter how serious the scene happening in the foreground is, if Ryutaros is around, more often than not he's dancing around in the background or doing something childish like drawing pictures. Naomi is known to join him on occasion.
  • Gangsta Style: Likes to wield his gun sideways in Gun Form.
  • Glass Cannon: Was originally the Lightning Bruiser before Wing Form was given that role.
  • The Gunslinger: Although if in dire situations, he can resort to Pistol-Whipping.
  • Handguns: DenGasher Gun Mode.
  • Iconic Item: His Bubble Gun. Becomes a Chekhov's Gun when it's one of the items that Kintaros gives to Ryotaro to complete their contract.
  • I Don't Want to Die: Nearing the finale, Ryutaros isn't anywhere to be seen, and Momotaros just says it's only him and Ryotaro now. A deleted scene reveals that this was because Ryutaros was afraid to disappear, which he'd have to do if Ryotaro succeeded in stopping Kai, and he was cowering in the DenLiner. Naomi comforts him, and this is how he musters up the courage to help in the final battle.
  • I'm Taking Her Home with Me!: Ryuta loves animals, and has a habit of bringing them back to the DenLiner. This is actually how the cast is introduced to Sieg.
  • In the Style of...: Double-Action Gun Form and Climax Jump Gun Form = Hip-Hop. Climax Jump Hip-Hop Version. In addition, he also gets to rap in several songs like Climax Jump DenLiner Form.
  • Laser-Guided Tyke-Bomb: Kai told him to kill Ryotaro and gain control of the DenLiner. Ryutaros decided not to do so due to his love for Airi.
  • Love Hurts: He did not take losing Airi to Yuuto well at all...
  • Love Redeems: Decides not to kill Ryotaro after realizing that his death would make Airi cry.
  • Macross Missile Massacre: Climax Form's Boistous Shot.
  • Murder the Hypotenuse: His response to learning that Airi loves Sakurai is to go after Yuto and try to kill him. It doesn't help that Kintaros advised him how to win Airi's heart, by saying that a woman is attracted to a man's strength.
  • Nice Hat: Whenever he's possessing someone to go along with the wavy bangs and purple streak in the hair.
  • The Nicknamer: Calls Urataros "Kame-chan" and Kintaros "Kuma-chan". Since Momotaros isn't based on an animal, Ryuta just calls him "Momotaros" without Honorifics, which annoys Momo.
  • Pet the Dog:
    • He confronted the Dance Posse and asked them if they were the reason that the animals being fed in the park got frightened.
    • He realizes that the Owl Imagin's rampage in the past will cause the puppy cared for by its contractor to die, and resolves to fight the Imagin full-force.
  • Psychopathic Manchild: Whenever he possesses Ryotaro, he somehow holds some kind of glee in chasing people down for no apparent reason. And for a while, he thought the best way to win Airi's heart was to get rid of Yuto and this was shown most prominently in a picture he drew (which depicts Den-O Gun Form blowing a giant bloody hole through Zeronos' chest). The biggest offender would be in Climax Deka, where he starts whipping out the handcuffs to any person who just looks like he'd be part in an Evil Organization.
  • Purple Is Powerful: Initially treated as the strongest of the four core Imagin, to the point that the other three had to work together to push him out of Ryotaro's body.
  • Shoulders of Doom: Gun Form.
  • Summon Backup Dancers: Being in a deserted location is no obstacle to his Crowd Song abilities.
  • Vague Age: It's impossible to tell what age any of the Taros are, since they get their physical forms from Ryotaro's imagination, but Ryutaros in particular appears to be a child, and is regarded as one by the other Taros. How mature he actually is varies—a lot of his behavior and mannerisms point to him being a young child, but he also identifies with other teenagers (like his dance posse.)
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    Sieg 

Sieg/Kamen Rider Den-O Wing Form

Voiced by Shin-ichiro Miki; suit actor Naoki Nagase

https://static.tvtropes.org/pmwiki/pub/images/sieg_1.png
https://static.tvtropes.org/pmwiki/pub/images/w_ryotaro.png
W-Ryotaro
https://static.tvtropes.org/pmwiki/pub/images/krdo_wing.png
Den-O Wing Form
"Advent, to the top..."
An arrogant swan Imagin, inspired by the story of Swan Lake and it's male protagonist, Prince Siegfried, specifically. He possessed a rich heiress, but because she was pregnant at the time, he possessed her unborn son immediately after. Sieg first came into being following the child's birth, referring to mother and child as his family. He was brought to the DenLiner crew's attention when Ryutaros brought him onto the train. His arrogant demeanor rubbed everyone the wrong way until Hana punched some sense into him, at which point he began calling her "Princess" and started gradually referring to the others as family rather than servants. He allows Den-O to assume the exceptionally powerful Wing Form, but because his contract was formed with a child, whose memory isn't as strong as an adult's, he begins "fading". Ryotaro discovers a loophole in that Sieg had previously completed a contract with the heiress (who wished for her baby to be born safely, which he was,) allowing him to travel to her past and exist peacefully; despite this development, he shows up in critical moments such as the series finale and the movies.
  • Aloof Ally: Inverted; he's actually willing to lend a hand to the DenLiner crew whenever and however he can, but most of the time the Taros (especially Momo) don't want anything to do with him.
  • Animal Motifs: Swan.
  • An Axe to Grind: DenGasher Handaxe Mode (made from the Axe and Gun parts).
  • Butt-Monkey: Perhaps as a result of audience reaction towards him. In later appearances, Sieg is treated with comedic levels of contempt by the other Taros, probably due to his acerbic personality.
  • Camp Straight: Obsessed with "beauty" but has feelings for Hana.
  • Catchphrase: "Advent! To the top!" Japanese 
  • Cultured Badass: He's based on a prince, and his form is the most powerful of Den-O's basic forms.
  • Demonic Possession: Though hardly unique to him, as an Imagin, Sieg's possessions are exceptionally powerful. Whether it's from his being "born" in the present or by sheer force of will, Sieg is near impossible to remove from Ryotaro once he has possessed him. Even when the other Taros are unable to possess Ryotaro due to amnesia, Sieg was able to do it just fine.
  • Deus Exit Machina: Wing Form is Den-O's most powerful basic form, and writers have made sure that his use was a rarity. The situation is inverted in Ore, Tanjou! where Sieg is the only Imagin available for a good portion of the movie (Ura and Kin were held captive, Ryuta was temporarily convinced by Gaoh to his side, and Momo couldn't synchronize with Ryotaro because the latter has amnesia). Played straight again later, where Sieg is the only Den-O that isn't present in the movie's climax, although no explanation was given for that since Yuuto could have just kidnapped a Sieg-possessed Ryotaro for the battle except perhaps being injured after getting hit by Gaoh's Tyrant Clash as Den-O.
  • Dual Wielding: Uses a weapon each composed of two pieces of the DenGasher.
  • Finishing Move: Royal Smash.
  • The Friend Nobody Likes: Most of the time, everyone sans Ryutaros seems reluctant whenever he appears.
  • Incredible Shrinking Man: Has the power to make people shrink to action figure-size by saying "Bow your head!" Japanese  The Imagin Anime gives him "Super Bow Your Head", which shrinks the whole world.
  • In the Style of...: Double-Action Wing Form = Arabic Pop
  • It's All About Me: "The world revolves for my sake."Japanese 
  • Jerk with a Heart of Gold: Despite his superiority complex and belief the world revolves just for him, he's actually a really good person at heart. The problem is just that the other Imagin don't want anything to do with him.
  • Lightning Bruiser: Wing Form moves significantly faster than most of the other forms, and is also Den-O's most powerful basic form.
  • Love at First Punch: Towards Hana.
  • Nerf: An in-universe one, his power and memory is weakened considerably due to his contract holder being a child. Taking into account how strong he still is, he would be unbelievably powerful if properly contracted to an adult.
  • Odd Name Out: Unlike the other four DenLiner Imagin, not only does his name doesn’t end with "Taros", but it also doesn’t reference a Taro of Japanese folklore.
  • Perpetual Molt: Feathers appear whenever he makes an entrance.
  • Power Gives You Wings: Especially in Super Climax Form.
  • Precision-Guided Boomerang: DenGasher Boomerang Mode (made from the Sword and Rod parts).
  • Put on a Bus: In series, this is justified due to how weak the imagination of the person he is contracted to is - however, he does return for the finale. In-franchise, his last appearance was in Episode Blue of the Chou Den-O trilogy. He hasn't been seen since - not even in Let's Go Kamen Riders, which brings back all but a handful of the other riders (including all the ones from Den-O).
  • Spell My Name with an "S": Some databooks list his name as Zieg.
  • Stealth Hi/Bye: In Final Countdown, he disappears during the Imagins' attempt to protect the Japanese village from Shiro's mercenaries, but later reappears for the climax much to everyone's surprise.
  • The Thing That Would Not Leave: For the Hikari Studio. Only Eijiro wants him around, and it's for taking pictures anyway.
  • True Companions: Constantly refers to the other Imagin as "family", much to Momo's chagrin.

Civilians

    Airi Nogami 

Airi Nogami (portrayed by Wakana Matsumoto)

https://static.tvtropes.org/pmwiki/pub/images/airinogami.png
Ryotaro's older sister and the owner of the Milk Dipper library cafe. She was forced to help raise Ryotaro after the death of their parents and thus often seems wise beyond her years. She's also very close to Ryotaro, worrying about his well-being and trying to help out with health drinks and herbal concoctions. The beautiful Airi enjoys good business mostly thanks to the horde of lovestruck men who pack the shop from opening to closing. For her part, Airi remains completely oblivious, her only passions seeming to be stargazing and brewing the perfect cup of coffee. One year prior to the series' start, Airi's fiance Yuto Sakurai vanished a month before the wedding; initially Ryotaro thought she hid her pain behind a smile, but to his great concern she seems to have completely forgotten about Sakurai, seemingly not even remembering why she has his beloved telescope in the shop (but still gazing at it fondly) and not realizing that the pocketwatch he gave her rests beneath it.
  • Beware the Nice Ones: In episode 30, Ryotaro offends Airi by calling in a hazmat team to dispose of one of her "healthy" concoctions; her response is to throw things at him, culminating in his own bicycle.
  • Cordon Bleugh Chef: Her energy drinks and herbal cures are...well, read the "Beware the Nice Ones" entry above. However, her coffee is exceptional, which makes her something of a counterpart to Naomi.
  • Distressed Damsel: Episode Red invokes this, since this is the condition of the contract between the Piggies Imagin and the Victim of the Movie: to put Airi in a dangerous situation so that he would be the one to rescue her, also invoking Rescue Romance.
  • The Ditz: She sometimes projects this. In the episode where Ryotaro is being held hostage, she doesn't even seem to notice. When Ozaki and Miura press the issue, she decides to do something...prepare special hostage snacks for him. Cue the entire male clientele of the Milk Dipper Face Faulting.
  • Dude Magnet: Her customers are mostly male, and quite a number of named characters are attracted to her.
  • In the Style of...: Double-Action Coffee Form, along with Naomi = Light Pop. No, seriously.
  • Laser-Guided Amnesia: Inflicted willingly in order to protect the identity and location of the Junction Point.
  • Oblivious to Love: She seems to be utterly unaware of how much attention she gets from her (all male) clientele, including from the dogged Ozaki and Miura.
  • Red Herring: As the identity of the Junction Point. It's not her, it's the child she will eventually bear.
  • Star-Crossed Lovers: She's separated from her fiancé Sakurai, and seemingly loses her memories of him, for complicated reasons. This is referred to in Zeronos' motifs.
  • Unwanted Harem: Not unwanted so much as completely unnoticed.
  • Yamato Nadeshiko: Pretty, caring, an excellent cook, and completely unflappable. Upon being told that Ryotaro was being held hostage by an armed robber, her immediate reaction was to go back to preparing coffee. The wisdom part is thus: she's been in on her fiancée's plan from the beginning, and allowed her own memories to be altered in order to protect the Junction Point, their future daughter Hana. And she's known from the start that "Ryo-chan" was Den-O, and that his friend Yuuto is the time-displaced teenage version of her fiancée.
    Seigi Ozaki 

Seigi Ozaki (portrayed by Akira Nagata)

https://static.tvtropes.org/pmwiki/pub/images/seigiozaki.png
One of the Milk Dipper regulars, Ozaki is a journalist for a Kasutori Magazine who's always on the lookout for a new scoop. He's also a major flirt, chasing women since a crush on his first-grade teacher and using his job to try and pick up chicks. However, he's most devoted to chasing Airi, trying to impress her with his connections while sparring with Miura. He's friendly towards Ryotaro, styling himself as the younger boy's future brother-in-law and sometimes sharing stories that, unbeknownst to him, reveal information about Imagin attacks.
    Isse Miura 

Isse Miura (portrayed by Ryo Ueno)

https://static.tvtropes.org/pmwiki/pub/images/issemiura.png
A self-proclaimed "super counselor" and Milk Dipper regular who feuds with Ozaki for Airi's affection, but is more introverted. Ozaki often tries to undermine Miura by making his interest in the occult look like superstitious nonsense, while Miura counters by pointing out Ozaki's wandering eye. He's also nice towards Ryotaro, and shows a good deal of concern for his well-being. After witnessing a battle between Momo and Ura for control of Ryotaro's body, Miura becomes convinced that Ryotaro is possessed and tries to help exorcise him, only to accidentally reveal the existence of Ryutaros.
  • Ignored Expert: In regards to the Imagin, at least until Airi and Ozaki meet them in Climax Deka.

ZeroLiner Crew

    Yuto Sakurai/Kamen Rider Zeronos 

Yuto Sakurai/Kamen Rider Zeronos

Because of the time-traveling nature of Kamen Rider Den-O, two versions of Yuto Sakurai exist as independent and distinct characters. Here, as in most media, they will be distinguished by their names, "Yuto" referring to the younger version and "Sakurai" to the older.

Yuto (portrayed by Yuichi Nakamura)

https://static.tvtropes.org/pmwiki/pub/images/yutosakurai.png
https://static.tvtropes.org/pmwiki/pub/images/kr_zeronos.png
"Let me say this to start: I am fairly strong!"

The teenaged version of Yuto Sakurai, as well as the warrior Kamen Rider Zeronos and the partner of the Imagin Deneb. Yuto initially appears after Ryotaro gets too close to Sakurai, warning the soft-hearted young man not to interfere, believing that protecting the timestream is different from protecting individuals, unlike Ryotaro. The brash, hot-tempered Yuto stands greatly at odds with Ryotaro's memories of a gentle, kindly, brotherly Yuto Sakurai, but according to the Owner, the two are indeed one and the same. He also acts childish at times, preferring his coffee overloaded with sugar, despising shiitake, and enacting comedic violence upon Deneb whenever the Imagin annoys him. Contact with Ryotaro and the DenLiner crew tempers Yuto's harsh personality as well as maturing him. The exact nature of his Zeronos powers are explained in tragic detail later in the story.


  • Anger Born of Worry: In the finale, upon seeing Deneb alive again, Yuuto was about to seemingly attack him again, only to fall into tears in Deneb's arms.
  • Badass Normal: He's not a Singularity Point like Ryotaro, but is able to fight as himself using Altair Form long before Ryotaro manages to do the same thing with Liner Form.
  • Boke and Tsukkomi Routine: Tsukkomi to Deneb's Boke.
  • Brought to You by the Letter "S": (A)ltair and (V)ega, which is visible on both their corresponding Zeronos cards, the ZeroLiner's cars, and their Finishing Moves.
  • Catchphrase: "Let me say this to start: I'm pr-e-tty strong!" Japanese . On a couple of occasions, Yuto replaces the second part with "I'm pretty ticked off!"
  • Catchphrase Spouting Duo: Oftentimes, with Deneb.
  • Character Tics: Giving Someone the Pointer Finger ("Let me say this to start! I'm pr-e-tty...") followed by the Bicep-Polishing Gesture ("...Strong!").
  • Deadly Upgrade: The Zero Form cards.
  • Defrosting Ice Queen: A male example. Yuuto started the series as a cold jerk and was occasionally quite rude to Ryoutarou. He gradually warmed up to him, and by the end of the series, they had become true friends.
  • Deus Exit Machina: Hospitalized, and therefore absent, for a good portion of Final Countdown after Taking the Bullet for Kohana, but reappears just in time for the climax. In Onigashima Battleship, the alteration of the timeline causes him to be erased from reality, again.
  • Did Not Get the Girl: At least not yet anyway. Much of the Episode Red movie dealt with the fact that Airi can't love the current Yuto the same way she did Sakurai (although the existence of Hana in a younger form implies that the two will eventually get together; presumably once Yuto matures into someone more like Sakurai).
  • Does Not Like Spam: Shiitake Mushrooms.
  • Finishing Move:
    • ZeroGasher: While Zeronos is in Altair Form, both of this weapon's mode's finishers take on the form of a green A.
      • Bowgun Mode: Grand Strike
      • Sabre Mode: Splendid End
    • Denebick Buster: Buster Nova
  • Fuel Meter of Power: He has a very limited suppy of henshin cards and has to make his transformations count.
  • Heroic Willpower: While Ryotaro can't manifest any decent Den-O forms by himself (until Liner Form), Yuto's stronger will allows him to assume Zeronos Altair Form without the aid of an Imagin.
  • Hidden Heart of Gold: Comes with the revelation about the Zeronos Cards, explaining that Yuto acts rude to keep people distant.
  • Holding Back the Phlebotinum: With good reason.
  • In the Style of...: Action-Zero = Rock. 2010 Version = Soft Piano.
  • Jack-of-All-Stats: Altair Form, one of the forms Yuto can assume.
  • Lightning Bruiser: Zero Form, one of the forms Yuto can assume.
  • Ma'am Shock: Delivers one to Mach during the events of Super Hero Taisen GP.
    "Don't call me Old Man!"
  • I'm Not Here to Make Friends: Non-reality show example; he says this outright when Deneb suggests he work with the DenLiner crew.
  • Picky Eater: He dislikes shitake mushrooms. The fact that he's eating them at the finale, after believing that Deneb vanished after the Big Bad's defeat shows just how much Deneb means to him.
  • Powers via Possession: Unlike Den-O, only one of Zeronos' forms requires Deneb to possess him to access it.
  • Sensitive Guy and Manly Man: Manly Man to Ryotaro's Sensitive Guy.
  • Significant Reference Date: When Yuto first makes his debut in the series, he's holding a ticket for May 27th, 2007. Go on, guess the airdate of that episode.
  • Sweet Tooth: Yuto really likes his coffee sweet, to the point where he puts way too much sugar in.
  • Swiss Army Weapon: ZeroGasher. The Sabre Mode is a BFS, Bowgun Mode is The Straight and Arrow Path, and Denebick Buster is a Talking Weapon.
  • Un-person: The cost of using his powers, due to not being a Singularity Point. The more cards he uses, the more his and Sakurai's existance in people's memories are erased, subsequently erasing them from reality itself. The first signs of this was the fact that Sakurai had disappeared just before his wedding with Airi, with no one (including the latter, except for Ryotaro), remembering him since.
  • Wrestler in All of Us: His way of dealing with Deneb's antics.

Sakurai (portrayed by Tomonobu Okano)

https://static.tvtropes.org/pmwiki/pub/images/past_man.jpg

Airi's fiance and Ryotaro's future brother-in-law, Sakurai was a gentle, kind-hearted man with a passion for astronomy he shared with Airi. The two were very much in love, and Sakurai treated Ryotaro like the little brother he never had; thus, Ryotaro's surprise when Sakurai disappeared just before the wedding is understandable, as is his confusion at the fact that nobody seems to remember his existence. Several times in the early part of the series, a cloaked man appears watching Den-O's battles in the past and checking a pocketwatch; by accident, Ryotaro bumps into the man and recognizes him as Sakurai. He attempts to track down the man, only to be warned off by Yuto.


  • Badass Longcoat: Does not show his face, but he fights well.
  • Big Brother Mentor: Ryotaro implies he was one, as one of his first conversations with Yuto is to explain the values that he taught him (namely, that even if he has awful luck and isn't very strong, it's not an excuse to do nothing.)
  • Big Damn Heroes: When Den-O and Zeronos were having trouble with The Dragon, Sakurai himself steps up to help them in battle, assuming Altair Form.
  • Chekhov's Gunman: He shows up, face concealed, at the scene of Imagin battles long before Ryotaro encounters and puts a name to him. He's also hinted at via Ryotaro telling Airi that she "shouldn't forget" in an early episode regarding a woman who wanted to forget her former love.
  • Guile Hero: Orchestrates a complex plan in order to protect his future daughter.
  • The Plan: Most of the show's plot is predicated on a plan by Sakurai and Airi to protect their daughter Hana from the Imagin.
  • Star-Crossed Lovers: With Airi, as referenced by Zeronos' theme (see Yuto's theme).
  • What the Hell, Hero?: Deneb tells off Sakurai for making Yuto use the Zeronos cards, even culminating in Deneb throwing Sakurai out of the ZeroLiner.
    Deneb 

Deneb/Kamen Rider Zeronos (and New Den-O) Vega Form (voiced by Hochu Otsuka; suit actor Yoshifumi Oshikawa)

https://static.tvtropes.org/pmwiki/pub/images/deneb.png
"Let me say this to start..."
Yuto Sakurai's Imagin partner, inspired by the legend of Benkei and allowing Yuto to transform Zeronos into Vega Form. Deneb is kind-hearted but somewhat on the thick side, his polite friendliness contrasting greatly with Yuto's loud, rude attitude. He often tries to better Yuto, encouraging him to be nicer or to work alongside Ryotaro as an ally rather than viewing the DenLiner team as a hindrance. Occasionally Deneb will even possess Yuto and run around being friendly, doing good deeds, and passing out Deneb Candy in order to win friends for the young man, but this invariably results in a beating from Yuto once he regains control. Deneb's history with Yuto and with the Sakurai that Ryotaro is familiar with is revealed later in the series.
  • Apologises a Lot: One of the humblest Imagins in existence.
  • Arm Cannon: Type 1; his hands can fire bullets from the fingers.
  • Badass Cape: Vega Form.
  • Battle Butler: Acts as Yuto's loyal servant (running errands, cooking, cleaning the ZeroLiner) and partner in battle, complete with being humble and honest to a fault.
  • Benevolent Genie: In stark contrast to the other Imagin, Deneb outright defected from the Imagin cause and joined Sakurai under his own free will. Even the Taros required a bit of persuasion before they joined Ryotaro's side. What wish he granted Sakurai was never revealed, although by Onigashima Battleship he was able to possess Kotaro, so we can assume it was completed at some point.
  • Beware the Silly Ones: Despite being Yuto's ditzy comedic foil and the nicest guy in the series, his few fights as Zeronos and New Den-O Vega Form show he's actually much better at fighting than Yuuto (who's not bad himself).
  • BFS: ZeroGasher Sabre Mode.
  • Blade on a Stick: New DenGasher Naginata Mode (New Den-O Vega Form, when he possesses Kotaro in Onigashima Battleship).
  • Boke and Tsukkomi Routine: Boke to Yuto's Tsukkomi.
  • Catchphrase: Usually begins with Yuto's "Let me say this to start!" Japanese , only to mess it up with an honest fact that bewilders everyone around him; he uses "The face on my chest is just for show" Japanese  a couple of times. He also says "Take care of Yuto!"Japanese  both in conjunction with the first phrase and on its own.
  • Catchphrase Spouting Duo: Sometimes gives the tail-ends of Yuto's phrases.
  • Chunky Updraft: When transforming into Vega Form.
  • Demonic Possession: Although as an Imagin he's capable of it, it's rather notable in that Deneb refrains from possessing others outside of Yuto, even when it's established he can. Even when possessing Kotaro, he promptly apologizes.
  • Empathic Weapon: Transforms into the Denebick Buster whenever Zeronos assumes Zero Form, and can still talk to Yuto.
  • Finger Firearms: All of his fingers are like this.
  • Finishing Move
    • ZeroGasher: While Zeronos is in Vega Form, both of this weapon's mode's finishers take on the form of a yellow V.
      • Bowgun Mode: Grand Strike
      • Sabre Mode: Splendid End
    • New DenGasher Naginata Mode: Brandish Dive
  • The Heart: Has many attempts to appeal, sometimes fail hilariously.
  • In the Style of...: Action-Zero = Rock. 2010 Version = Soft Piano.
  • Malicious Misnaming: Momotaros (and sometimes the other Imagins as well) likes to call him Odebu (a deformation on his name, which literally means "tubby").
  • Mighty Glacier: In Vega Form.
  • More Dakka: Zeronos Nova.
  • Nice Guy: Deneb is unfailingly polite to everyone, even his enemies, and every time he's in master's body it's for the purpose of trying to make friends with everyone Sakurai pushes away. This stands out particularly in contrast with the more amoral and even malicious Imagin throughout the show.
  • Nice Job Breaking It, Hero!: Because he didn't tell Yuuto of his plans of going through a Haunted House event, Yuto thought that Deneb was in danger when the latter was scared out of his wits; thus, Yuuto had to use up a Zeronos card even before finding out what really happened. Yuuto didn't like Deneb's actions one bit.
  • Power Makes Your Hair Grow: When possessing Yuto, present or past.
  • Shipper on Deck: Ships Yuto with Airi. This gets the limelight in Episode Red of Cho Den-O Trilogy.
  • Shoulders of Doom: Vega Form.

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