User blog comment:Mnzombie/Issei's Peerage/@comment-3965848-20140328082025

Here's my guess, say when Rias retires from Raiting games all the girls in her peerage could move over to Issei's, Ashia and Xenovia planned doing so, so why all of them. And maybe others such as Jeanne (Knight) and Le Fay and Kiyome as Pawns.
 * Queen - Akeno
 * Rook - Koneko, Rosswiese
 * Knight - Xenovia
 * Bishop - Ashia, Ravel