Eiji Hino is the main protagonist of the tokusatsu series Kamen Rider OOO. He is a compassionate and selfless drifter who becomes Kamen Rider OOO after being entrusted with the OOO Driver and Core Medals. Eiji fights to protect others from the monstrous Greeed, driven by his desire to help people without expecting anything in return. Throughout the series, his journey explores themes of desire, loss, and the meaning of true happiness.