User blog comment:B214/High School DxD DX.4 discussion/@comment-2601:8C:601:5692:3D30:770C:CE5:1085-20170725134222/@comment-2601:8C:601:5692:84EF:7653:F85A:CCBA-20170729070451

@Pawn, wow, didn't expect a rant there...

My point was that nowhere does it state that any of the named Devils descended from the 72P serving in peerages are ranked as "high-class" (with maybe one exception). We only assume they are. As for the fact that you receive a set of Evil Pieces upon becoming one, that is a fact stated several times. That doesn't mean that it is necessary to form a peerage, but most do. Remember, for most Devils, they must apply for and take a promotion test, which was said to include knowledge necessary to be a King in the case of high-class. A Devil not interested in being a King generally wouldn't bother. If Kiba and Saji actually aim for high-class, it is only in order to match Ise.