Webas nokotan was a high school girl, fans called her the granddaughter of the demon king as they shared the same walk. While the majority of the fandom was. Webcontrary to initial belief, muzan kibutsuji's heart stopped several times while he was still in his mother's womb, resulting in a persistent struggle for survival during the. Webdemon slayer season 4 ended with the hashira training arc, which saw tanjiro and the other slayers prepare for the final battle against muzan. Webmuzan kibutsuji, the original demon and the main villain of demon slayer, has a human wife and daughter. But why does he keep a family when he abuses and. Webmuzan kibutsuji and kagaya ubuyashiki are related by blood, as they share the same family curse of being born as demons. Kagaya is the head of the demon. Webkagaya ubuyashiki, the head of the demon slayer corps and the ubuyashiki family, is a descendant of muzan kibutsuji, the progenitor of demons. Webkagaya reflects on his family's cursed legacy and their quest for redemption, while muzan boasts about his lack of punishment despite his countless atrocities.