User blog comment:B214/Talk About What You Want! 3/@comment-3965848-20150328211959/@comment-24098614-20150329013149

I am talking about Issei's children with Rias specifically because in the eyes of society they are not Pureblood Devils but a mixture of other races. The Devils are picky when it comes to this because it is a tradition for all Heirs to be Purebloods, and the ironic thing is that the more Humans are recruited as Devils the lesser their blood becomes.