{{Muzan, when he was a human, he was weak and frail with an illness. He killed his doctor because he thought the medicine wasn't working. However, he found out it was... He became a demon and seeked for a demon who could go in sunlight... He wanted to be the perfect being. He was the Demon King and by conquering the sun, he would be perfect. He manipulates other demons to do his bidding so he can be perfect. He is very powerful.}}