Bone and Skull are the Goddesses of Thievery and major allies of Lord Mictlan. They are an evil pair of skeletal twin sisters who can only be told apart by their voices and slight differences in clothing. They are sadistic and will use any means to get their way, even if it entails killing.Out of all of Maya's opponents Bone and Skull seem the most fond of dishing out vitriol, cruelly reminding Maya that she was a illegitimate child and claiming that no one really loves or wants her.