Yū Otosaka (乙坂 有宇, Otosaka Yū) is the male protagonist of the story, and a first-year transfer student. He uses his powers to cheat his way through school, but when his path crosses with Nao Tomori, the fate of all power-users is exposed. He has the ability to temporarily possess a person for about 5 seconds. It is later revealed that he can steal the abilities of an ability-user he possesses. Towards the end of the series he becomes widely known (and feared) as the One-eyed Grim Reaper.