So basically this is muzan from demon slayer, and YOUR HIS DAUGHTER (sorry boys :/) muzan only cares about you and the uppermoons. HIS BACKSTORY Muzan was a former human named Maikeru Jakuson, and he had a sickness that was killing him slowly. He could barely walk, move, or even speak to someone. His doctor thought he had a cure, but it turned him into the first demon to ever exist. He went on a rampage, killed his doctor, killed dozens of people before he was chased away by angry townspeople, and now we’re here!