Akaza



Holding the position of Upper Moon Three, he was originally a human called Hakuji (伯治) who during childhood, resorted to stealing in order to feed his ill father, who ends up committing suicide to release his son of the burden of caring for him. He is then adopted by a martial artist and lives happily with him and his daughter, who ends up becoming his bride, until both are poisoned to death by members of a rival dojo. After slaying all members of the dojo in revenge, Hakuji is scouted by Muzan to become a demon, changing his name to Akaza. He ends up killing himself during his fight against Tanjiro and Giyu.