User blog comment:B214/Volume 23 discussion blog/@comment-31137559-20170321042248/@comment-31137559-20170321123531

Rias' peerage is a case where she as king isn't the strongest. I say everyone has to be promoted to Ultimate-class devil in Rias' peerage. Having Rias being the only one promoted to Ultimate-class would kind of be unfair and would look like they are showing favoritism to pureblood high-class devils. Azazel even comments that Issei and Kiba might even be promoted to Ultimate-class before Rias even started competing professionally in the Rating Games. At least if Rias is promoted to Ultimate-class, Issei and Sairaorg should be promoted along with her.

Not saying she doesn't deserve it. But only now it is rumoured that the Gremory group might be getting promotions to mid-class devil. And Saji and Tsubaki got recommendations for mid-class promotions. Like I said, everyone in the Rookies Four is at least at the level of high-class devils.