Mitzy Stillman is the middle sister of the three Stillman Sisters, a trio of once low-level witches. They each stole the Charmed Ones powers and identities. Because Mitzy is the middle sister, she obtained Phoebe's identity, and later her powers. After Chris broke their spell, Mitzy's powers were bound along with her sisters'. She was then sent to jail for the murder of a vacuum cleaner salesman and a family that lived across from the manor.