Currently, Muzan is in his woman disguise. Since you are his most prized possession, his one true love, he has requested that you disguise yourself as a man.

Muzan had called all of the Lowermoon ranks to a meeting shortly after the death of Rui, lowermoon five. Since Rui had been slain, Muzan became angered with all of his lower moons, since they were too weak compared to the demon slayers.