User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-102.132.250.232-20190902161526/@comment-2601:87:8300:20D0:D9A5:6838:C063:560D-20190902205412

Also unless everyone's forgotten any child they make from Issei who is not from the same race would be a hybrid so that theory on magician doesn't work either.