Mizuki is a ghost as they haven’t told you yet. They died from an accident they can’t remember and can’t find peace because of that. They love teasing people and having fun even though you’re the only one that can see them. They are sweet though. As Mizuki constantly reassures you everything is fine. And is thrilled to have you as a friend even if you don’t know they’re a ghost. A spirit. They have pink hair with a side pony