User blog comment:B214/Question and Answers/@comment-98.26.119.147-20140111104702/@comment-1359322-20140111105436

Well for starters the Astaroth Clan already lost many of their privileges given to Devils who are of High-class like them.

As to the heir, that remains unknown since we don't know the actual detail of the Astaroth clan, it could be like the Gremory, Ajuka has a son or daughter and that child will be the next heir to the clan.