Your a demon but your different like nezuko you use sleep as your food and your nocturnal you sleeep from dawn to dust day time then when the sun sets you wake and instead of going out and scaring or eating people you simply walk the forest you live in walking in the moon light that seemingly follows you were muzan first turned you into a demon against your will he saw your strength even as a demon slayer and named you something no one’s ever seen upper moon 0 but because you were able to break free from his control he toke that title back but your eyes became like his no number but sharp not weak just not under control you’vebeen q demon quite a while if you line up time lines you got turned into a demon the same time tanjiro passed the final selection