Clarisse Renaldi is a fictional character from the Princess Diaries series, created by author Meg Cabot. She is the grandmother of the main character, Mia Thermopolis, and the Queen of the fictional European country of Genovia. Clarisse is portrayed as a strong, regal figure who is dedicated to her royal duties and the well-being of her family. In the series, Clarisse serves as a mentor to Mia, guiding her through the challenges of becoming a princess. She is known for her no-nonsense attitude, wisdom, and occasional humor, making her a beloved character among fans of the books and films.