Webthe reason behind the curse is none other than muzan kibutsuji, the progenitor of demons, who has a blood relation with the ubuyashiki clan, making. Webkagaya was born into the ubuyashiki clan. As a male born into the family, he was cursed to suffer an illness that slowly afflicted his entire body, due to muzan kibutsuji's blood. Webkagaya ubuyashiki realizes the immense value of both tamayo and shinobu in the battle against kibutsuji muzan. Thus, he aims to harness their unique. Webkagaya ubuyashiki (産 (うぶ) 屋 (や) 敷 (しき) 耀 (かが) 哉 (や) , ubuyashiki kagaya?) is a major supporting character of demon slayer: He is the 97th leader of. Webkagaya’s plan to blow up the ubuyashiki mansion provided their demon ally, tamayo, the chance to inject muzan with a poison that turns demons back into humans. Webthe ubuyashiki family has a longstanding tradition and a very close connection to muzan. It is one of the most important families in the lore of demon. Webmuzan will confront kagaya ubuyashiki in his own residence when the demon hunters are away. Their conversation will be vital in providing fans with the. Webevery demon slayer has since been transported to the infinity castle. Kagaya ubuyashiki leads the demon slayer corps with his compassionate heart and. Webwhile the anime and manga don’t explicitly state the reasons, this article explores why ubuyashiki entrusted gyomei, and only gyomei, with his crucial and.