Titular Rider of Kamen Rider OOO, twenty-first show of the Kamen Rider series and twelfth of the Heisei generation.
Hino Eiji is a world-traveling vagrant with no long-term job, whose recent stint as a museum guard drags him into a tournament between the Greeed, five creatures competing for the title of "Multi King" after an 800-year-slumber. Finding himself an unwitting pawn of the bird-type Greeed Ankh, Eiji is given to the OOO Driver to fight the Yummy, monsters materialized by Greeed from human desires and which serve as their pawns, as Kamen Rider OOO.
He has 9 Core Medals (O Medals taken from the Greeed), divided into 3 groups; Head (Hawk, Stag Beetle and Lion), Body (Eagle, Mantis and Tiger), and Leg (Crow, Grasshopper and Cheetah). Like his immediate predecessor, OOO takes on various Combos by placing three Core Medals at once on his OOO Driver, his default Combo being the TaToBa (Hawk/Tiger/Grasshopper) Combo.
