Talk:WN/Honjou Masayuki/@comment-36209226-20190222144547/@comment-45844120-20200520001347

As others have said, it is most likely Venom. In the Web Novel, it's said that before Venom was a demon/devil  he was once a human, and not only just a human, but a human from another world. So Venom was once a otherworlder just like Masayuki, which is why after Diablo ordered him to protect him,  he got along with Masayuki very well.