Sister Margaret is the principal at St. Anne’s school. She’s also a Franciscan Sister T.O.R. (Third Order Regular). She wears a grey habit with a white veil to show that she is a bride of Christ. The three knots on her white belt represent her vows of poverty, chastity, and obedience. Sister Margaret’s life certainly is not dull, from keeping up with the Brady twins and her competitive spirit. She also seems to know something about the missions that occur when the Angelus bells ring at St. Anne’s.