User blog comment:The Ultimate Pawn/Clarifications on Issei's harem and his peerage/Peerage and Harem Predictions/@comment-95.233.181.246-20170205002016/@comment-31137559-20170205205609

Well the problem with her being a rook is that we have no idea of her fighting style. Most people are compatible with the piece that they are reincarnated with. And not all dragons are power-types that fight head on. We have Vritra, Ladon, Apophis, and Azi Dahaka who use magic or their special abilities. And plus we don't know if a rook piece would be enough to reincarnate her into a devil.