Demon slayer (AU)

This is my demon slayer AU where my oc is a demon, but is a demon slayer. She is also a uppermoon. She stays under muzan, but working against him. She isn't under the curse either because muzan trust her enough not to do anything dumb, but none of the other uppermoon's doesn't trust her. She can walk the earth in the sun and none of the demon slayers know she a demon. She feeds off of the demons she kill. The hashira trust her mostly because to them she seem very odd. She can also eat human food, but sometimes it makes her sick.