Eiji Hino

Eiji Hino (火野 映司) is Kamen Rider OOO (仮面ライダーＯＯＯ（オーズ）), the main protagonist in Kamen Rider OOO. He made a cameo debut in the film Kamen Rider W Forever: A to Z/The Gaia Memories of Fate where he fought against the Luna Dopant.

In an alternate timeline where Shocker rules the world after the defeat of the Double Riders by Kamen Rider #3, he is referred to as Shocker Rider OOO (ショッカーライダーOOO (オーズ)). It is under this title that he participates in the Rider Grand Prix.

Past
Eiji Hino is the son of a politician who travels the world with his grandfather. During one his expeditions, he travels in Africa. During his time in Africa, Eiji attempted to use his fortune to help out a village. In turn, Eiji befriends a girl named Alfreed. Following her to her village and learning the residents as well as their culture, he is dragged into a civil war between villages. During the tragic moments of the civil war, Alfreed is eventually killed in the war and Eiji is held captive for ransom. His family paid for his ransom, allowing him to escape Africa; but his family then used his tragedy to gain public support for his father's political platform. Though Eiji ultimately refers to this moment as his greatest regret, the ordeal caused Eiji to lose any selfish desire and become willing to help those in need, going so far to even risking his life for complete strangers.

Kamen Rider OOO
"I've been here and there but... having to save people's lives... is practically difficult everywhere!"

- Eiji's claim when he is chosen to become Kamen Rider OOO. He returned to Japan to fund for more of his travels. His latest part-time job, a security guard at the Kougami Art Museum, ends due to the destruction of the museum around him due to him being drugged to sleep by some would-be robbers. Eiji takes a strange red coin he found while off duty which he thinks is his pay. This causes a disembodied arm to begin to follow him around, until the arm announces that it is called Ankh and is one of the ancient beings known as the Greeed, and he needs Eiji's help to become King. When they are attacked by a monster called a Yummy, Eiji risks his life to rescue Ankh, who in return saves him and gives Eiji two more strange coins, calling them "Medals", and a belt, enabling Eiji to transform into Kamen Rider OOO.

Eiji appears to aid Kamen Rider Double on a rooftop as OOO, providing him cover during the Futo Invasion by NEVER, allowing Double to reach the Futo Tower as OOO defeats Luna Dopant.

After destroying the Yummy and further encounters with the Greeed, people from the Kougami Foundation begin to approach Eiji, offering their assistance in the fight against the Greeed and Yummy, but their true motives are not clear. He also gets a job and housing at the Cous Coussier, after the owner Chiyoko Shiraishi finds out that he is a world traveler. In the process, joined by Akira Date, Eiji learns more of the Greeed's desire to become whole and the reason why Ankh is unable to assume his complete form. However, things changed when Eiji ended up becoming a host to half of a set of Purple Core Medals that react to his lack of selfish desires, the same presumed reason why he is able to use OOO's powers without any sign of going berserk so far like the First OOO, with dangerous consequences. Soon after, Eiji learns from Kousei Kougami, the Foundation's owner, that the only way to counteract the purple Core Medals is to acquire a desire of his own, something he is yet capable of.

Later on, he turns into the dinosaur-like Eiji Greeed after absorbing two more purple Core Medals from the other Purple Greeed, Kiyoto Maki, in a bid to make him go beserk. However, it was by then Eiji remembers his desire is to have the power to help others and later agrees to Kougami's suggestion to absorb all the Cell Medals in the Kougami Foundation's possession to achieve that desire. However, it does not halt Eiji's Greedification during his his final battle when he uses all the Cell Medals in his body in a risky attack that fails to destroy Maki. But before Eiji undergoes his Greeed transformation, Ankh gives Eiji his last three Core Medals, disappearing from Shingo and allowing Eiji to transform into OOO Tajadol Combo to defeat Maki, resulting in the disappearance of the Core Medals, with the Core Medal that houses Ankh's consciousness splitting in half.

As a now-normal Eiji falls back to the Earth, Ankh appears to him as his disembodied arm, bidding his farewells, before disappearing into half of the broken Taka Medal that once held his consciousness. Saved by Kamen Rider Birth, receiving the other half of Ankh's Core Medal that Hina found, Eiji leaves Japan and resumes his journey around the world, using Shingo's smartphone to keep in touch with his friends while trying to find a way to fix the broken Taka Medal with a spectral Ankh arm following him.

Movie War Mega Max
Eiji returns to Japan as he sees Ankh waiting for him in the airport, curious as he still holds Ankh's broken Taka Core Medal. Appearing to aid Date and Goto, he regains several of his Core Medals from Kamen Rider Poseidon, allowing him to trade blows with Poseidon until he realizes that Poseidon's host, Michal, is suffering. After meeting Michal, Eiji is able to separate the Poseidon entity from Michal. Giving advice to Michal, Michal regains the courage to assume his original form as Kamen Rider Aqua. Together, OOO Tajadol Combo and Aqua defeat Poseidon. Eiji gives his farewell to Ankh, realizing that he's from the future, but is reassured that he will resurrect Ankh one day. A moment later, Foundation X attacks Eiji, taking Poseidon's Core Medals. Recruiting Gentaro from the Kamen Rider Club, he meets up with Shotaro and Philip, explaining what Foundation X is after. Along with Fourze, the two free the Seven Legendary Riders as OOO and Fourze runs to the Exodus. Meeting with Aqua once again, OOO receives the Super Core Medals, effectively changing into the Super Tatoba Combo. Together with Fourze, the two defeat the Super Galaxy King and Eiji resumes his journey of restoring Ankh's Taka Core Medal.

Kamen Rider OOO (novel)
In the aftermath of Mega Max, Eiji returns to Africa to stop the still ongoing civil war. Using the OOO Driver, he uses the Tatoba Combo as a diversion to draw fire, uses the Gatakiriba Combo to destroy the soldiers' guns, uses the Latorartar Combo to destroy tanks, and uses the Sagohzo Combo to stop rocket launchers. Using the Tajadol Combo, Eiji wipes out the air forces while rescuing the pilots from their deaths. In the dried out deserts, Eiji uses Shauta Combo in order to create rain. The enemy tribe slowly starts to fall back with Eiji's intervention and the war slowly ends.

Super Hero Taisen
"The friendship between Kamen Rider and Super Sentai might be the ultimate treasure in the universe." "Yeah, as long as you reach out your hand, I'm sure it'll work this friendship between Rider and Sentai that stretches over the divide."

- Marvelous and Eiji accepting each others friendship. During Super Hero Taisen, Eiji was attacked by the Dai-Zangyack army and is sent to the Dark Dimension. Eiji later reappears teaming up with the Gokaigers, lending them his Core Medals, which turned into Ranger keys. Joe refers to this as OOO's Grand Power. After the battle, he and Marvelous shake hands after reaffirming the friendship between the Riders and Sentai.

Movie War Ultimatum
When Koyomi came under attack by Ghouls after all the Riders entered Yu Kamimura's Underworld, Eiji appears and fights them off. Explaining that Gentaro called for help, he explains that Riders should always do what they can to help each other out. This makes Koyomi's Please Ring glow, and within the Underworld, projections of Eiji (along with Shotaro, Philip, Ryu, and Goto) giving the kids Rider Rings. Touching the Rings on Haruto's Hand Author, a spell activates that summons OOO and the other Riders, giving Wizard and Fourze support as they defeat the Akumaizers.

Kamen Rider Wizard
OOO appears with all the Heisei Riders from Kuuga to Fourze, led by Decade, in a special two-parter after the finale, The Kamen Rider Rings and Neverending Story.

OOO first appears on his Ridevendor alongside Decade on his Machine Decader, summoned to the world within the Magic Stone through their Rider Rings by the alternate young Haruto, as the prime Haruto watches, to take him and his Koyomi back home to Antique Shop Omokagedo.

OOO is later summoned with all the other Riders when the 13 Rider Rings are taken by Amadum, the evil wizard who rules the world of monsters, to defeat Wizard, only to find out that they will not obey him just because he possesses their rings, and that they will always fight for freedom and not merely justice. After the Riders destroy his initial guard of monsters, Amadum tries to escape with the boy Haruto, summoning his strongest and largest monsters to deal with the Riders. However, the Riders individually pull out their various tricks to deal with the giant monsters, with OOO assuming Putotyra Combo temporarily. With his monsters destroyed, Amadum attempts to force the boy to wish to leave so he can escape the world with him. The Kamen Riders attempt to stop him only to have their powers stolen by Amadum's true monstorous form when they try to fight him, with OOO having his medals absorbed. However, the young Haruto defies Amadum after hearing the words from Wizard of turning despair into hope, summoning a new Rider to his world. This new Rider, Gaim, gives himself the Kamen Rider name after being told by Wizard that they come to help when people request it. This revelation that the Kamen Riders aren't bounded by evil turns the tables on Amadum as he is beaten back by Gaim, forcing the powers he stole to be returned to the other Riders, transforming them to their ultimate forms, with the return of the Medals immediately transforming OOO to Super Tatoba Combo. OOO then participates in a successive barrage of Rider Kicks from all 15 Riders against Amadum which is finished by Wizard and Gaim. After Amadum is destroyed, OOO stands with the other Riders watching over the young Haruto as he wakes up before returning to his world.

Kamen Rider Taisen
OOO joins the Heisei Riders in their war with the Showa Riders in Zawame City.

At the climax, OOO is one of the surviving Riders in the battle between Heisei and Showa. He attempts to perform his Tatoba Kick on Riderman, but is defeated by his Rope Arm, transforming into his Lockseed. Gaim is soon left as the last Rider standing before Ambassador Darkness of the Badan Empire reveals himself to be Ryo Murasame (Kamen Rider ZX). Together, they restore the other Riders and all 30 Kamen Riders defeat the Badan Empire.

Due to the timeline alteration caused by Shocker, Eiji became one of the brainwashed Riders in that timeline, donning the name of Shocker Rider OOO. OOO was one of several Shocker Riders who volunteered in the Rider Grand Prix under Shocker Rider 3, who had been personally challenged by Kamen Rider Drive. During the race, OOO, along with Agito, Decade and Fourze, found that his Rider Machine, Ridevendor, had been immobilized by Mach's Signal Tomarle. OOO ultimately fell short of the Top 2 in which Drive prevailed over Rider 3.

Once Rider 3 was integrated into the Great Leader of Shocker's Rider Robo form, OOO was among the Riders who attacked Drive while being caught in the crossfire as the Rider Robo joined the fray. Ultimately, the Double Riders 1 and 2 made their appearance having survived their apparent demise from within the Rider Robo, and broke Shocker's brainwashing on the fallen Riders, enabling all Riders to unite in a final battle against Shocker.

Surviving the onslaught of the History Modifying Machine, OOO fought and destroyed Shocker's monster Shiomaneking with the Tatoba Kick shortly before the Rider Robo was destroyed along with the machine by. Among the remaining Riders who witnessed the farewell of Kyoichiro Kuroi as the perversion of history was reversed, OOO's place in history was restored.

Kamen Rider Ex-Aid "Tricks": Kamen Rider Genm
Eiji Hino also appears as OOO, being summoned and brainwashed by Genm, due to his malevolent trick when using the Ganbaride Gashat.

Chou Super Hero Taisen
OOO Shauta Combo fights as part of the Kamen Riders' Blue Warrior Team. Eiji's had two other combos on two other teams, OOO Latorartar Combo fought as part of Team Highspeed while Tajadol Combo fought as part of Team Flying, however all three combos failed to win the title.

Kamen Rider Heisei Generations FINAL: Build & Ex-Aid with Legend Riders
With Enigma causing trouble, Eiji reached out and began to investigate the mysterious phenomenon happening. He came to the conclusion that Foundation X was behind it. Later, Eiji manage to save Ryuga from the cliff with Emu's help which he informs them about the culprit behind mysterious phenomenon. As they reach to Foundation X's laboratory, they confront Kaisei Mogami who then uses the organization's replica version of the Core Medals which creates the Greeeds, including Ankh to fight them. As Eiji is having difficult time fighting the replica copy of Ankh, the broken Taka Medal started to light up causing the copy struggling until it falls to its death. Despite this, Eiji jumps out and uses the replica body as a new vessel to revive Ankh. With Ankh's help, they retrieve several Core Medals from the Greeeds which allows Eiji to become OOO as he fights the Greeeds while Ryuga and Emu deal with Kaisei. While fighting, OOO witness the Enigma being activated which he meets up with the other Riders. While OOO is fighting a army of X Guardians, Ankh lends him his Core Medals which causes his body to disappear having OOO to be shocked about it. After the battle, Eiji gives Ankh the ice pop before disappearing once more, hoping to see him again.

Personality
Despite often coming off as happy-go-lucky in his personality, Eiji is actually quite strong-willed and more clever than he lets on, and was easily able to pick up on the fact he could use Ankh's need for him and the OOO Driver to keep the Greeed in line. Another defining trait is Eiji will fight to protect anyone in need, even complete strangers and at the risk of his own life. This stemmed after his regret from not saving the little African girl he befriended during a civil war which his family fortune started. He keeps a collection of coins and almost always has pairs of underwear of different designs and colors which he at times even gives to others. This is revealed to stem from an optimistic outlook taught to him by his grandfather, who said that all a man needs is a pair of underpants for tomorrow.

Eiji possesses no selfish desires, which made him ideal for being OOO but also became a weakness once the Purple Core Medals sought out a host, as they immediately found him and took root. However, taking the advice of Akira Date, after becoming a Greeed, Eiji remembers the desire he had so long ago: Eiji wanted the power to protect people no matter where they are, which Ankh gave to him in the form of the OOO Driver.

Super Hero Taihen
OOO appears in the Super Hero Taihen net movie, Super Sentai Murder Mystery! You’re the Great Detective! as one of the suspects for the murders of, , and , as the evidence collected suggests a "Hopper"-themed rider is behind it.

When it is revealed that net movie director was the murder culprit, OOO holds up   and  as one of several Riders and Rangers holding Super Sentai and Kamen Rider merchandise respectively, when the  explain to Kato that all the Riders love Super Sentai and vice versa.

Kamen Rider Climax Heroes
Kamen Rider OOO appears in the Kamen Rider Climax Heroes game series, beginning with his own installment (Climax Heroes OOO). In his first appearance, OOO only can use the Tatoba, Gatakiriba, Latorartar, and Sagohzo Combos (as well as any Random Combo using combinations of those Medals). In Climax Heroes Fourze, he gains Shauta, Tajadol, and Putotyra Combos, with Burakawani Combo as a special stand-alone character. Climax Heroes Fourze also has an exclusive Purple-Eyes version of Tatoba, representing Eiji going berserk under the influence of the Purple Core Medals; this character does not appear in the sequel, Super Climax Heroes.

All Kamen Rider: Rider Generation 1 & 2
Kamen Rider OOO appears as the main character of All Kamen Rider: Rider Generation, whose plot is loosely inspired by OOO, Den-O, All Riders: Let's Go Kamen Riders. He also appears in the sequel All Kamen Rider: Rider Generation 2, where he and Kamen Rider Double can perform the Golden Xtreme/Prominence Drop combination attack from Kamen Rider × Kamen Rider OOO & W Featuring Skull: Movie War Core.

Kamen Rider: Battride War
Kamen Rider OOO appears in Kamen Rider: Battride War, which unites the riders of the Heisei era from Kuuga to Wizard. OOO is the last Rider saved along the second story path, and breaks free of Mnemnosyne after reliving the memory of his final battle with Kiyoto Maki.

In Battride War, OOO has access to all his normal Full Combos, but will automatically transform back into Tatoba after a set period of time (reflecting the danger of over-using Full Combos). Additionally, only Tatoba and Putotyra possess more than one special attack, though the other Combos will use their special powers during their basic combos (for example, Latorartar's combo begins with the Liodias and Tajadol can launch fireballs from the Taja Spinner while in mid-air).

OOO's special attacks are:
 * Tatoba Combo: Tora Claw Multi-Slash, OOO Bash, Tatoba Kick
 * Gatakiriba Combo: Gatakiriba Kick
 * Latorartar Combo: Gush Cross
 * Sagohzo Combo: Sagohzo Impact
 * Shauta Combo: Octo Banish
 * Tajadol Combo: Prominence Drop
 * Putotyra Combo: Strain Doom (used after transforming), Tail Divider, Gust, Blasting Freezer

Kamen Rider: Battride War II
Kamen Rider OOO reappeared in Kamen Rider: Battride War II, summoned by Cinema along with the other Neo-Heisei Riders in order to create the "ultimate movie". OOO's stage was based off from Kamen Rider OOO Wonderful: The Shogun and the 21 Core Medals, with Gara as his main enemy. In addition to his abilities from the first game, OOO gains the Flash Feather attack for Tajadol Combo as well as Burakawani and Super Tatoba Combos (with the latter serving as OOO's Ultimate Form).

Kamen Rider: Battride War Genesis
Kamen Rider OOO reappeared in Kamen Rider: Battride War Genesis

Kamen Rider Batton-Line
to be added

Kamen Rider Travelers Record
to be added

Devices

 * OOO Driver: Transformation belt
 * O Scanner: A device that scans the medals
 * O Medals
 * Core Medals: Allow OOO to use Combos
 * Cell Medals: Uses for weapons and the Ridevendor
 * O Medal Holder: A case that holds the O Medals
 * Candroids: OOO can-like support robots

Weapons

 * Medajalibur: Personal weapon
 * Taja Spinner: Tajadol Combo's primary weapon
 * Medagabryu: Putotyra Combo's primary weapon
 * Burahngi: Burakawani Combo's flute

Vehicle

 * Ridevendor: OOO's Rider Machine
 * Toride Vendor: Latorartar Combo's personal bike

Rider Keys
The Kamen Rider OOO (仮面ライダーOOO (オーズ)レンジャーキー) appeared when Eiji gave his OOO Medals to the, transforming them into these keys. In , these keys changed the Gokaigers into OOO's Full Combos, and were then used to power the.
 * Gatakiriba Combo Key (ガタキリバコンボ キー)
 * Latorartar Combo Key (ラトラーターコンボ キー)
 * Sagohzo Combo Key (サゴーゾコンボ キー)
 * Shauta Combo Key (仮面ライダーオーズシャウタコンボ キー)
 * Tajadol Combo Key (タジャドルコンボ キー)
 * Putotyra Combo Key (プトティラコンボ キー)

Gokaiger/OOO 

Tatoba Combo Ranger Key
The Kamen Rider OOO Tatoba Combo Key (仮面ライダーオーズタトバコンボレンジャーキー) is a Ranger Key based on Kamen Rider OOO's basic Multi Combo. The Kamen Rider OOO Tatoba Key was released in conjunction with the six other OOO Combo Rider Keys which appeared in , while the Tatoba Combo Ranger Key only exists as a toy. Of course as with all Ranger Keys, should it exist, this Key would be able to one into Kamen Rider OOO's Tatoba Combo.

Portrayal
Eiji Hino is portrayed by Shu Watanabe (渡部 秀), who wrote all of the ending themes of the series.

As Kamen Rider OOO, his suit actor is Seiji Takaiwa (高岩 成二), who has been the suit actor for the majority of leading Heisei Kamen Riders. Aside from OOO, Seiji Takaiwa was also the suit actor for Eiji when he became Kamen Rider Birth in summer movie.

As Eiji Greeed, his suit actor was Yugo Fujii (藤井 祐伍), who is also served as suit actor for Kyoryu Greeed. Yugo Fuji would later become the main suit actor for Kamen Rider OOO in Movie War Ultimatum.

Rider No.
As the leading Rider protagonist of Kamen Rider OOO, Eiji Hino (Kamen Rider OOO) is labeled Kamen Rider #27 (仮面ライダー27号) and Heisei Rider #12 (平成ライダー12号).

In Popular Culture

 * OOO in Tajadol Combo made a cameo appearance in the Cafe Detective Club manga by Fujishiro Takeshi (also creator of Nagasarete Airantou) as a silhouette alongside Ultraman Zero & the Gokaigers.
 * In the Hayate no Gotoku manga, the Tajadol Combo suit was parodied by Sakuya Aizawa, wearing a bird costume with "Tajadol Combo" written in the middle of the costume.
 * In episode 9 of Haiyore! Nyarko-san W has Nyarko make several references to OOO, including her using Eiji's trademark battle cry "Seiya" (セイヤッ) throughout the episode as well as wielding a weapon, similar to the Medajalibur, performing the Tajadol Combo's Prominence Drop, and mimicking Eiji's transformation pose. When the episode's villain is defeated, he shouts out "Sagohzo!", a reference to episode 5, where Nyarko used "Tatoba!" and "Gatakiriba!" as yelps of pain.