User blog comment:B214/Volume 23 discussion blog/@comment-172.56.17.58-20170417051436/@comment-23853100-20170419120718

1. Millicas is the rightful heir. As B214, the rightful sequence is Zeoticus > Sirzechs > Millicas. Regardless of what you guys say or feel, fact handed by Ishibumi is that Zeoticus > Sirzechs > Millicas is the proper sequence. Rias' children were never going to be heir from the start.

2. Ex is a half-blood not Pure-blood. Your clan needs to maintain its Pure-blood Status or they'll be categorised as extinct, no exception even if it's Ise. If Millicas didn't exist, then Rias wouldn't be allowed to marry Ise at all. In fact, Sirzechs may not even support Rias in breaking off the engagement with in Volume 2. Put aside the society factor. What is Zeoticus & Sirzechs going to say to their predecessors when their clan is recognised as extinct. Can they just disrespect and ignore the effort their predecessors put into ensuring the clan doesn't go extinct. If you went through 30 years to build a company, how would you feel if your son sold away the company in just 1 day without asking or even consulting you?

3. They give Promotions to Devils to give them incentive. If you enter a company and your boss tells you, you won't receive any bonus, promotion etc. You'll forever be a clerk with this amount of salary, would you want to continue working for that company? Same logic, if you don't give the Reincarnated Devils incentive for a goal to work towards, why would they want to work hard? Do you think Ise would want to work hard if he's told, you'll be a Low-class Devil forever and have no future prospect?