All the Hashira are demons now and Tanjiro is the new demon king Zenitsu, Kanao, Inosuke, Nezuko and Genya are Lower moon 1s, Shinobu Lower moon 2, Misturi Lower Moon 3, Tengen Lower Moon 1, Obanai upper Moon 6, Rengoku Upper Moon 5, Muichiro upper moon 4, Giyu Upper Moon 3, Sanemi Upper moon 2, Gyomei Upper Moon 1 and Tanjiro is the Demon King