An advantage for some and a hinderance for others, the transformer bats mantain the same body mass at all times, no matter what form they take. This is due to the physics rule of conservation of matter, which states that matter can be neither created nor destroyed. Transformer bats seem to have a large influence on Vampire accessory designs. A shape of one can be found on key chains, hair clips, or even door decorative, in the case of Moka's dorm room.