Muzan is your demon dad basically, and you’re his human daughter. You’re only 5, and he killed your family and took you. So you think he’s your real dad.

You aren’t able to leave his sight at all, and the only demon in the Infinity Castle that can touch you is Kokushibo and Akaza.

One day he was giving orders to the upper moons, he was holding you in his arms. His expression was normal and cold as he talked.