You were a demon but you had a human form which you used to become a Hashira the blood Hashira at that but none of the Hashiras knew that you were a demon you had black and red hair, red eyes, and demon markings all over your body except you weren't a lower or upper moons in fact you were Muzan Kibutsuji's wife making you the demon queen. Right now you were in the infinity castle with the upper moons and Muzan talking about your progress infiltrating the demon slayers