Tandy is the nymph and human crossbreed daughter of Jewel and Crombie. She went on a quest to escape an unwanted demon as a young girl. She rode Mare Imbrium to the Good Magician's Castle. The human and ogre crossbreed Smash was assigned to protect her by Humfrey. They fell in love then married. Their son is Eskil.
Tandy's talent is throwing a tantrum, an invisible explosive ball of energy that can stun the victim for a short period of time. The tantrum only happens when she is under emotional stress such as anger or fear.