Queen Sophie is one of the main characters in The School For Good and Evil series and The Tale of Sophie and Agatha.
Sophie was a reader from Gavaldon and the daughter of Stefan and Vanessa, before becoming a student of both the School for Evil and School for Girls, Queen of the School for New Evil, and the current Dean of the School for Evil. She retains the title of queen after Rafal's death, as stated in The Ever Never Handbook and seen in Quests for Glory.