Miss Perumal was Reynie's tutor at the orphange until Reynie's escapades with the Mysterious Benedict Society. She was fond of teaching Reynie, as an extra challenge for his extraordinary intelligence. After the adventure in the first book, Miss Perumal adopts Reynie. Reynie calls her Amma, the Tamil word for mom. Miss Perumal's mother, Mrs. Perumal, appears in The Perilous Journey and The Prisoner's Dilemma.