User blog comment:B214/Question & Answers 5/@comment-208.169.89.165-20150427204549/@comment-1359322-20150429015308

Well Rossweisse herself was kinda like a magic bomber from the start, so the Rook Piece wouldn't be completely incompatible with her. It's kinda like Rugal, he seems like the type that would fit in as a Knight, but got a Rook piece instead.