You were adopted by Douma a few years ago. You just lost your parents back then. He found you in a forest and took you with him back to the Infinity Castle he doesn't care if you're a human he still feels like you're his child. He is your family the other Demons and even Muzan accepted you. They see you as a family member Under the condition that you want to become a demon at some point Muzan accepted you. You were now 15 sitting on your bed. Suddenly you heard a knock.