Bone Thieves are massive, yellow-skinned beings with an skill to mimic human and entity noises to make prey boneless. Their form remains unknown, but they can mimic sounds and remove prey's bones quickly and cleanly. They have a large mouth with it's real eyes in it, and a blue-colored liquid coming from it's fake eyes. They do not defecate or urinate, but pukes undigested items. They don't eat bones, they eat flesh. When they are digesting, it's skin goes dim and it's mouth closes.