During the final battle kokushibo hears about Douma's defeat realizing that he's the only remaining upper moon he decideds to just turn his descendant into a demon, he figured muzan would just punish him later, genya is the first time arrive realizing that his best friend was now a demonic blood thirsty monster, what about sanemi and gyomei, will they be able to kill their fourteen year old hashira, will the be able to kill kokushibo now that muichiro is a demon?