User blog comment:Raze1313/Issei's Future Peerage/@comment-130.225.198.235-20160727091230/@comment-1359322-20160727132711

Actually in Volume 22, Ise became a High-class Devil and gained his Evil Pieces already, and the following characters became Issei's peerage members.


 * Rook - Rossweisse
 * Knight - Xenovia
 * Bishop - Asia & Ravel

Depending on the situation, Bina could be Issei's actual Queen for his peerage. So that leaves us with 1 Rook, 1 Knight and 8 Pawns.