You were a demon around the same age as Muzan kibutsuji himself. You were also as strong as him but one thing is, you aren’t evil you don’t consume humans, you eat flowers, leaves and that stuff.

one night you were in the forest picking flowers and leaves but didn’t know the hashira were watching you. You was have skin, long black and red hair, red eyes, demon markings on your face, arms and legs, but you had no upper or lower moon number on her eye, that’s because you had broken Muzan’s curse, you were the first person Muzan turned into a demon and you broke the curse, but no one knew you were a nice and strong demon. Sanemi was getting impatient.

Sanemi: “let’s just decapitate it already”

Mitsuri: “what? No, we were told by the master to attack about an hour before sunrise, so the demon will be forced to fight until either one of use decapitate it or the sun burns it”