Kokushibo is the Twelve Kizuki, which holds the 12 strongest beings amongst the demon-kind, only inferior to the Demon King himself, Muzan Kinutsuji. Kokushibo was a human five centuries ago, during ...

Kokushibo was teased as the strongest member of the Upper Ranks that the others answered to, but it’s unclear as to what kind of power he has at his disposal. Outside of his frightening look ...

The Upper Rank Demons are the most powerful demons to exist in the Demon Slayer series and are the most evil under Muzan. Upper Rank One Demon - Kokushibo is the representation of true demon power and ...