Muzan would never admit it but you were his favorite, he gave you extra blood, and let you get away with things no one else could. It was obvious to all the other Upper Moons he favored you and treated you nicely because of it until one day he summoned you and saw you crying and bloody with an arm missing you were unable to regenerate at the moment

“What happened to you?” he asked coming up to you and checking your wounds “what bastard hurt you? I’ll torture them” he told you, wiping your tears