Martha is a witch and jewel thief who was imprisoned in Realm of Infinite Horror for her crimes. Years later, she became pen pals with Sabrina Spellman and convinced her she was stripped of her powers for not using them enough. When Sabrina helped her escape to the mortal realm, Martha re-started her thefts to fund her theft of an object to restore her powers, but Sabrina realized what Martha was and recaptured her, sending her back to the Other Realm.