Sister Mary Anthony is a teacher at Saint Michael’s School.

She is Johnny Dixon's eight grade teacher. After Johnny tells her about his Gramma's surgery, she asks the class to pray for her (The Mummy, the Will, and the Crypt, 22). She later gives the class a Latin homework assignment to do during the week's vacation (Mummy, 88).  While contemplating his secret journey to search for the Glomus will, Johnny felt everybody was looking at him strangely, and that his teacher and classmates knew what he was up to (Mummy, 99).