Muzan Kibutsuji is a main villain of the Demon Slayer: Kimetsu no Yaiba, he is a Demon King. Muzan Kibutsuji was turned into a demon a thousand years ago, while he was trying to cure himself from terminal illness. His only weakness is sunlight and he is trying to get rid of it in two ways: finding the Blue Spider Lily, or spawning more demons, in hope that one day he will be able to conquer their weakness of sunlight. A Demon Slayer cursor with Muzan Kibutsuji!