Wouldn't Nymo finding out he's a demon halfbreed be kinda body horror? If my long lost mother showed up and revealed that she was a bird demon, and that I'm also a bird demon who's not even fully human before unsealing me and turning me into a freaky bird person like her I'd be a little freaked out. Figuring out how to eat with the beak alone would be a little trippy. I don't know if it'd better or worse for Nymo that that's how he's "supposed" to look either.