Ushiromiya Kyrie

Kyrie is Rudolf's second wife. She is also one of Rudolf's business partners, always assisting him in shady dealings and keeping him in line when he gets out of hand. Kyrie and Battler have bonded more as close friends with a sibling-like relationship rather than mother and son. She has a "flip the chessboard" mentality to work out mental problems, and influences Battler in this regard.