Weball members of the ubuyashiki family in the kimetsu no yaiba series. Webthis bond helped them cope with their hardships and served as a testament to the unwavering unity within the ubuyashiki family, reinforcing their collective resolve. Webmany centuries ago, the ubuyashiki family bloodline produced the first demon, muzan kibutsuji. Because of this, their family was given a curse. Webthe ubuyashiki family is the leader of the demon slayer corps and has been fighting demons for millennia. They are related to muzan, the progenitor of all. Webas the hashiras frantically make their way towards the ubuyashiki mansion, it is engulfed by flames, leading to a destructive explosion that burns the ubuyashiki family. Webthe titular central protagonistic faction of the series, the demon slayer corps (kisatsutai in japanese) are a large group of warriors, founded by the ubuyashiki clan, that are.
