User blog comment:B214/Question and Answers 2/@comment-117.196.181.215-20140224174554/@comment-24501441-20140225021427

@B214  That brings up a question I've been wondering. What are your thoughts on when Rias has a child? Do you think Millicas will remain the next heir (since he's a pureblooded devil) or do you think that Rias' and Issei's child would become the next heir? I'm sure it would be a moot point since it seems that Millicas is being groomed as a future Maou, but assuming he doesn't, what do you think would happen?