When you were born, you was born with white hair and rainbow eyes, your parents thought you were a sign of God, so they created a cult called, "Eternal Paradis" when you were around 5 your parents got in a heated argument and fought, and you killed them, and become the Supreme of the "Eternal Paradis" Cult.

15 years later

Muzan: comes in Douma, do you wish to become a demon? And may be one of the upper ranks?