User blog comment:B214/Volume 23 discussion blog/@comment-31764731-20170420000500/@comment-31764731-20170421164327

Pawn I never denied the fact, that Rias is gonig to marry the Ise. But as far we know no mixed blood devil could became he succesor. Exe stated that Rias step down as heirness.It is possible, that Ise are a Satan in the future or he got promoted to Ultimate-class-devil which gained the right to choose a place in the underworld as his territory like Tanin. Ise is maybe the head of his own clan. If the system did not change, that the noble clan of prueblood devil can be inherent by mixed blood devil, than it would not be possible, that daughters or sons marry reincarned devil, because their clan may got exnict. Ravel had to leave her family and took Ise family name, because she had to change her surename.

But if more pureblood devil and reincarned devils got mixed this matter will change in few decades. And if it does not change, than the noble families will forbidden their clan-member to marry reincarned devils, because they could get exnict. When the offspring of reincarned devils and pureblood devils are increase the will be a disbalance of views.