User blog comment:B214/Volume 22 spoilers/@comment-182.53.88.122-20160724082440/@comment-184.66.76.70-20160815135804

That makes zero sense whatsoever. First, how can Ise still have his pawn pieces when Rias now has this Mr.Black in the pawn position? Second, there's no way that Ise is going be a part of two rating game teams, one as a pawn and one as a king. I mean, what if there is a match up between Rias and Ise's teams? Who wouldn't want to see that battle? That would be a Pay Per View event, and which team would Ise be on? Would he fight against himself? Stupid. Third, I know the anime is a different source, but he as much as said he was going to be leaving Rias's team when he got his own peerage, in that third season episode where Xenovia told him she wanted to follow him to his new team.

So, no, he's not remaining a pawn on Rias' team.