User blog comment:B214/Volume 23 discussion blog/@comment-31764731-20170420000500/@comment-31137559-20170421142059

And like I said, does that really hold true much later in the series when a reincarnated devil is about to marry a noble pureblood devil? And they wouldn't really lose their status because Issei is a resident devil of the Underworld and Rias' proper husband. And Zekram Bael even accepted their relationship. When has anyone said that Issei and Rias' child can't inherit the household since they have been engaged? He has the status, rank, and position as Rias' fiance. And he is widely accepted across the Underworld. Strength matters more to them than what rules they implemented and their pride. After Issei and Rias are engaged, can you point me to where it said their son can't become part of being an heir because of being mixed blood despite Issei being a devil? Those houses went extinct because they went bankrupt and fled to the human world and breeded with human. While Rias is marrying a devil(not a pureblood, but a devil nonetheless) and still able to become head of the house despite being married to a reincarnated devil.