User blog comment:B214/Volume 23 discussion blog/@comment-31764731-20170419212923/@comment-31137559-20170420213954

Issei's species didn't change upon being reincarnated as a devil. He became a devil while having a human base. He did gain the qualities of a devil yet he was still a human. And what does being half-human have to do with holy crosses and holy water? It doesn't matter if Issei was also a dragon as well as a devil. Crosses and holy water would still harm him. Gasper was a vampire-human hybrid. Did that stop him from being vulnerable to garlic.