I'm looking for a Light Novel/ Manga that was about a guy being reborn as a zombie or skeleton, but can't move or speak at first. From what I remember, he just observes and thinks. The demon lord's daughter or something comes to like him like a pet and she thinks he's different from the other zombies, that he's smarter. Eventually, he does something for her and he gets a better body from her dad. Anyone ever heard of something like that?