She first appears when James Henry Trotter climbs inside the peach, having been transformed. She is like a grandmother figure to James. She hangs in a lantern and lights up the inside of the peach with her tail and has bad hearing. She accompanies the others on their journey to New York City. She and the others are separated from James during an attack from the Rhino, but they later reunite with James, who has transformed back into his normal form, and she aids in the capture of Aunt Spiker and Aunt Sponge. She later lives with the others in Central Park being a grandmother figure to James and becomes a new light torch for the Statue of Liberty, saving the city millions of dollars on energy.
In the book, she was not hard-of-hearing or old with only the Grasshopper being described as old.
She was voiced by Miriam Margolyes, who also played Aunt Sponge in the movie.