Aizetsu the youngest middle brother of his family, his demon slayer weapon is a Jumonji Yari (spear), is the water hashira. Has 4 other brothers, wears a baggy uniform, cold to people he doesn’t know well, softens up to some people. Has a strong hatred towards demons after what they did to the eldest brother in the family, Urami, they kill him. His other brother are Sekido, Karaku, Urogi and Zohakuten