Board Thread:Questions and Answers/@comment-32556318-20170712153049/@comment-45762951-20200528070635

I see it this way, the author was probably watching some Naruuuudo (Naruto)  and was like "demon kid sounds like a great idea", then pulled some stuff from revelations and was like " I like vampires" probably watched a little bit of blue exorcist while he was at it and it built from there.