Yoriichi was turned into a demon instead of Michikatsu and now Michikatsu has to look after Yoriichi and make sure he eats no humans

Former wind hashira:"We should just kill him now. It would be better for all of us."

Former flame hashira:"He hasn't eaten any humans and besides Master said he's on our side."

Former stone hashira:"..."praying

Former water hashira:"We can't just assume we don't know what he's thinking."

Former lighting/thunder hashira:"Your right we can't just assume."