Younger Toguro

Younger Toguro (戸愚呂弟, Toguro-otouto?) is a human turned (absolute strength class or a Kairin-like demon) demon and the main antagonist during the Dark Tournament arc. Once a great martial arts master and Genkai's lover, Toguro is psychologically scarred when a demon named Kairin kills all of the students at his dojo. Toguro and Genkai participate in the Dark Tournament and defeat Kairin in the final round. Toguro decides he does not want to age and lose his power, so as his prize for winning he asks to be turned into a demon. 50 years later he returns to the Dark Tournament, challenging Yusuke, hoping he has finally found a fighter worthy of his full 100% power.