Eiji Hino

Kamen Rider OOO (仮面ライダーOOO(オーズ)) is the main protagonist and one of the main characters in the series of Kamen Rider OOO. His title is pronounced similarly to both "Os," refers to the three O's in the series title which represent the character's transformation items, as well as meaning "multiple kings (王ｓ)". The three O's also represent the infinity symbol with an additional circle over the center, stating that Kamen Rider OOO is Over Infinity. His debut was a cameo in the film Kamen Rider Double Forever: A to Z/The Gaia Memories of Fate where he fights against the Luna Dopant. Before Eiji Hino, there was a previous Kamen Rider OOO who had fought and sealed the Greeed away.

Eiji Hino
Eiji Hino (火野 映司) is the son of an politician who travels the world with his grandfather. While at Africa a year prior to the series, Eiji attempted to use his fortune to help out a village. However, his money was used to fund a civil war that cost the life of a little girl Eiji befriended whose death he was unable to stop while he was forced to looked on helplessly. Though the Hino family used his sob story to get the people's support, the ordeal caused Eiji to lose any desire and become willing to help those in need, going so far to even risking his neck for complete strangers.

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.

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 Kamen Rider 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 (映司グリード) 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 fully became a Greeed, Ankh gives Eiji his last three Core Medals, disappearing from Shingo and allowing Eiji to transform to defeat Maki, resulting in the disappearance of the Core Medals, with Ankh's sole remaining Core Medal splitting in half.

As a now-normal Eiji falls back to the Earth, Ankh appears to him as his disembodied arm, saying 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 while find the way to fix the broken Taka Medal with a spectral Ankh arm following him.

In Movie War Mega Max, it is revealed that Eiji is currently working together with the Kougami Foundation on their attempt to create new Core Medals in hope of restoring Ankh's broken Core Medal.

Super Hero Taisen
Eiji and Hina were surrounded by the Dai-Zangyack army. When he was fighting with the army, he found Daiki (as Diend) being cornered by Marvelous (as GokaiRed). At that dangerous situation he ended up being hit by Marvelous Dimensional attack to protect Daiki. Later he catch up with Joe and Daiki when they were in the Dark Dimension and said that the real battle has just begun. He teamed up with Gokaiger during the battle with Bio Hunter (in this movie as Rider Hunter) Silva and give them the rest Core Medal and being called as the OOO's Grand Power by Marvelous.

Movie War Ultimatum
Eiji will reappear during Wizard's portion of the movie. His role, aside from helping Double, Accel, Birth, Fourze, Meteor and Wizard fight the Akumaizer and their Monster Army consisting of several defeated Dopants, Yummy, Zodiarts, and Phantoms that were previously defeated by the Kamen Riders.

Personality
Despite often coming off as happy-go-lucky in his personality, Eiji is actually quite strong-willed 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 tought 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 immediatley 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.

OOO Driver
The OOO Driver (オーズドライバー, Ōzu Doraibā) is a belt that gives Eiji Hino the ability to become Kamen Rider OOO. The belt is created from the same seal that kept the Greeed in their 800 year slumber. To transform into Kamen Rider OOO, Eiji inserts three Core Medals into the O Slater (オースレイター, Ō Sureitā), turning the O Slater on the Force Drive (フォースドライブ, Fōsu Doraibu), scanning the Core Medals with the O Scanner, and then holds the O Scanner up to his chest. According to Ankh, because it was Eiji that broke the seal on the OOO Driver itself, it will only work for him and no one else. However, someone else can perform the physical action of scanning Medals for Eiji as long as he is wearing the OOO Driver. The reason the seal broke was because of Eiji's lack of desire, which made him perfect to become OOO.

O Scanner
The O Scanner (オースキャナー, Ō Sukyannā) is a device that is able to read the energy found within O Medals. By using the O Scanner on a set of three Core Medals in the OOO Driver, it allows for the transformation into Kamen Rider OOO or one of his various Combos. By scanning the Core Medals in the OOO Driver, again, it initiates one of Kamen Rider OOO's finishing attacks known as Scanning Charges (スキャニングチャージ, Sukyaningu Chāji). The O Scanner can also be used on the Cell Medals in the Medajalibur to initiate its Scanning Charge, as well, however it has a different manner to use it's Scanning Charges. The Medajalibur's Scanning Charges are designated as "Single", "Double", or "Triple", depending if OOO has put the amount of Cell Medals, with the only difference between the Scanning Charges is the amount of energy is put out for the OOO Bash.

O Medal Holder
The O Medal Holder (オーメダルホルダー, Ō Medaru Horudā) is a special case given to Ankh by Hina Izumi after she had commissioned it while she and Chiyoko Shiraishi were in Egypt. It is able to hold 24 Medals, usually Cores. This first appears in the Kamen Rider OOO portion of Movie War Core, where Ankh gives Eiji three Medals for him to transform.

Medajalibur
The Medajalibur (メダジャリバー, Medajaribā) is a sword that serves as Kamen Rider OOO's main weapon. By inserting three Cell Medals into the Medajalibur and scanning them with the O-Scanner, it can be used to perform a slashing finishing attack called the OOO Bash (オーズバッシュ, Ōzu Basshu). Even without performing the finisher it is shown to be powerful enough to cut through anything in the line of its attack, even when it is a distance away. Interestingly when it cuts through inanimate objects like a building, the object reforms. Its name is a portmanteau of Medal and King Arthur's legendary sword, Excalibur.

Medagabryu
The Medagabryu (メダガブリュー, Medagaburyū) is Putotyra Combo's signature weapon, enabling Kamen Rider OOO to unleash the full potential of the Purple Core Medals. It can change between its Axe Mode (アックスモード, Akkusu Mōdo) and its Bazooka Mode (バズーカモード, Bazūka Mōdo). The Medagabryu can draw out the full potential of the Cell Medals, by inserting a number of Cell Medals into the "mouth". Doing so in any Combo other than Putotyra will make it announce a Combo and a jingle remix, except for the Tajadol Combo. When Cell Medals are inserted in the Medagabryu when in the Putotyra Combo, Kamen Rider OOO can perform a Putotyranno Hissatsu (プトティラノヒッサツ, Putotirano Hissatsu) depending on the weapon's mode. When in Axe Mode, Kamen Rider OOO can perform the Ground of Rage (グランド・オブ・レイジ, Gurando obu Reiji) slash or the Strain Doom (ストレインドゥーム, Sutorein Dūmu) blast if the Medagabryu is in Bazooka Mode.

The Medagabryu can be used with other Combos in Axe Mode, but Bazooka Mode is only usable while in Putotyra Combo. The Medagabryu is the most dangerous weapon OOO can wield to the Greeed, because it has the power to destroy Core Medals, thus permamently killing a Greeed. It also can absorb a massive amount of Cell Medals to charge up its attack power, thus destroying a Greeed in one hit instantly if it properly hits.

Candroids
The Candroids (カンドロイド, Kandoroido) are special support robots that are held within the Ride Vendor. After inserting a Cell Medal into the Ride Vendor in its vending machine mode, a beverage can-like device is "bought" from the machine. The Candroid is transformed from its Can Mode (カンモード, Kan Mōdo) into its Animal Mode (アニマルモード, Animaru Mōdo) through the pull-tab on top. Normally, a large number of them can be deployed from the Ride Vendor, but only one needs to be manually activated, the others simply activating on their own soon afterwards.


 * The Taka Candroid (タカカンドロイド, Taka Kandoroido) is a Hawk Candroid with an Animal Mode can fly, and is primarily used by the Kougami Foundation to gather Medals or performing recon. It is the first of the Candroids to appear.
 * The Tako Candroid (タコカンドロイド, Tako Kandoroido) is an Octopus Candroid, it's Animal Mode is a flexible flyer that can join with fellow Tako Candroids to form various things like roads, bungee cords, or trampolines. It flys by spinning in a helicopter fashion or like an actual octopus. And much like an actual octopus, the Tako Candroid is capable of releasing ink to aid in escape. It is the second of the Candroids to appear and the most used for support in handling Yummies.
 * The Batta Candroid (バッタカンドロイド, Batta Kandoroido) is a Grasshopper Candroid with an Animal Mode that has the ability of hopping to long distances and shoot medals. It also has the ability to transmit messages through other Batta Candroids, used as video cameras for recon purposes, or to trick people with, as was the case of Ankh tricking Uva that he left. It is the third Candroid to appear, but did not first come from a Ride Vendor, but rather as a deal proposition for Eiji and Ankh as a field test before being put into the Vendors themselves.
 * The Tora Candroid (トラカンドロイド, Tora Kandoroido) is a Tiger Candroid created by Kiyoto Maki who personally gives it to Eiji. It can enlarge itself and combine with the Ride Vendor to become the Toride Vendor. It is the fourth Candroid to appear, and is the first one to truly be of an offensive nature.
 * The Unagi Candroid (ウナギカンドロイド, Unagi Kandoroido) is a Electric Eel Candroid developed by Maki and sent to OOO by Goto (at first Eiji thought they were snakes). It is designed to gather Cell Medals more effectively with an Animal Mode that has the ability to create electric shocks, and can form a restraining cable of sorts when several Unagi Candroids link up together. They are not that durable, as outside help can remove the linked up Unagi Candroids, so long as the means isn't conductive. They are the fifth Candroid to appear.
 * The Kujaku Candroid is a Peacock Candroid developed to gather Cell Medals more smoothly, first used by Erika Satonaka to deliver the Condol Medal to Kamen Rider OOO during the rematch fight with the Lion-Kurage Yummy. It can rotate its sharp, sawblade-like tail feathers at great speeds to propel itself, create small tornados, shread through foes, and to hover in the air. They are the seventh Candroid to appear, but in it's first appearence, it was just sitting on Kougami's desk.
 * The Ptera Candroid is a Pteranodon Candroid is a next-generation Candroid developed to utilize the Cell Medal energy more efficiently. It moves better than other Candroids and can transfer information via ultrasound. Like the Taka Candroid it is capable of flight and is more useful in combat, but even then, they are not quite as durable and an enhanced Yummy can take them out in one swing if it connects. They are the eighth Candroid to appear, and once more not first used by OOO, as Dr. Maki first used them as a desperate ploy to save Chiyoko Shiraishi from his own Yummy.
 * The Torikera Candroid is a Triceratops Candroid is a next-generation Candroid developed to utilize the Cell Medal energy more efficiently. Compared to other Candroids, the Torikera Candroid seems to have very limited mobility. They seemed to be a successor to the Gorilla Candroid in the aspect of delivering Cell Medals to Birth, as well as being a ranged combat-orientated Candroid. They are the ninth Candroid to appear, and once more not first used by OOO, as Birth first used it after finding the lone Candroid in Dr. Maki's trashed lab after the latter abandoned Kougami Foundations.
 * In Kamen Rider Battle: Ganbaride, Kamen Rider OOO and Ankh have access to the Furifuri Candroid (フリフリカンドロイド, Furifuri Kandoroido), a teal-colored Candroid that when used grows several times in size and after it is shaken and opened, it releases a blast of energy in an attack called the Furifuri Can Hour (フリフリカンアワー, Furifuri Kan Awā), similar to soda can eruptions.

Ranger Keys
The Kamen Rider OOO Ranger Keys (仮面ライダーOOO (オーズ)レンジャーキー) appeared when Eiji gave the OOO Medals to the Gokaigers, the medals transformed into these keys. In Super Hero Taisen, these keys changed the Gokaigers into OOO's Full Combos, and were then used to power the GokaiGalleon Buster.
 * Kamen Rider OOO Tajadol Combo Ranger Key (仮面ライダーオーズタジャドルコンボレンジャーキー): The Rider Ranger Key that represents the Blazing Combo; it was given to Marvelous.
 * Kamen Rider OOO Shauta Combo Ranger Key (仮面ライダーオーズシャウタコンボレンジャーキー): The Rider Ranger Key that represents the Marine Combo; it was given to Joe.
 * Kamen Rider OOO Latorartar Combo Ranger Key (仮面ライダーオーズライトラーターコンボレンジャーキー): The Rider Ranger Key that represents the Scorching Combo; it was given to Luka.
 * Kamen Rider OOO Gatakiriba Combo Ranger Key (仮面ライダーオーズガタキリバコンボレンジャーキー): The Rider Ranger Key that represents the Strongest Combo, it was given to Don.
 * Kamen Rider OOO Putotyra Combo Ranger Key (仮面ライダーオーズプトティラコンボレンジャーキー): The Rider Ranger Key that represents the Invincible Combo; it was given to Ahim.
 * Kamen Rider OOO Sagohzo Combo Ranger Key (仮面ライダーオーズサゴーゾコンボレンジャーキー): The Rider Ranger Key that represents the Gravity Combo; it was given to Gai.

Appearances

 * All Episode of Kamen Rider OOO (Episode 1-48)
 * Kamen Rider Double Forever: A to Z/The Gaia Memories of Fate (Cameo)
 * Kamen Rider × Kamen Rider OOO & Double feat. Skull: Movie War Core
 * OOO, Den-O, All Riders: Let's Go Kamen Riders
 * Kamen Rider OOO WONDERFUL: The Shogun and the 21 Core Medals
 * Kamen Rider × Kamen Rider Fourze & OOO: Movie War Mega Max
 * OOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Go Kamen Riders
 * Kamen Rider OOO Hyper Battle DVD: Quiz, Dance, and Takagarooba!?
 * Net Movie: Kamen Rider OOO Allstars: The 21 Leading Actors and Core Medals
 * Kamen Rider × Super Sentai: Super Hero Taisen
 * Kamen Rider × Kamen Rider Wizard & Fourze: Movie War Ultimatum

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 as well as the Eiji Greeed.

Tatoba 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 Super Hero Taisen, while the Tatoba Ranger Key only exists as a toy. Of course as with all Ranger Keys, should it exist, this Key would be able to transform one into Kamen Rider OOO's Tatoba Combo.

Trivia

 * Eiji is the fourth primary Heisei Riders to transform into (one of) their series' secondary Rider(s), with Shouichi being the first, Shinji the second, and Takumi the third.
 * He's also the second primary Heisei Rider to do this in a movie.
 * The count of all of his transformations (both Full Combos and Random Combos) is the largest count in franchise history, with the possibility of 129 different forms.
 * He is the third Rider that has his final-in-series form be his most powerful, but also carry a risk of overriding his nature and turning him into an incredibly powerful monster, with Yuusuke being the first and Kenzaki the second.
 * He is the second Rider to turn into one of his series' monsters as a result of said form, Kenzaki being the first.
 * Eiji is the only of these three to do the following: get turned into a monster, have his nature overriden by this form, but overpower the form and use it to his advantage, only to gain his humanity back after the form is lost.
 * He is the seventh Rider whose powers were made for evil intentions, as his OOO Driver was created so that the Previous OOO could rule the world. The first being Kotaro Minami, as the King Stones were created for the Gorgom Century Kings, with Kotaro being intended into a Century King, and the sole victor would become the Creation King by having both stones of the Sun and the Moon. Faiz, Kaixa, and Delta, were the second, third, and fourth, as their Gears were created by SmartBrain to protect the Orphnoch King when he awakes. Wataru was the fifth, as Kiva's power was created for the King of the Fangires to use. Tsukasa, having his DecaDriver being created for him to lead Dai-Shocker, was the sixth.