User blog comment:B214/Volume 23 discussion blog/@comment-172.56.17.58-20170417051436/@comment-24549585-20170419025750

Well no matter what even if Rias and Ise have kids when she steps down Millicas becomes the family head. And No rias and ise's kid will not be the next family head because the will not be pure blooded. And yes it is a requirment to be pure blooded.