Webkagaya ubuyashiki from the demon slayer series has been receiving a ton of attention from fans. This was due to the contents of the final episode from season 4,. Kimetsu no yaiba and its 2019 anime. 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. His title indicates both his leadership role and the respect he commands from his. Webwhat is the significance of kagaya ubuyashiki's illness? The illness on kagaya ubuyashiki, the leader of the hashiras and head of the demon slayer corps, is due to a family curse.