Devin's daughter, Delancy, who will be crowned princess and ruler of Gardania at the school's graduation ceremony. Blair struggles in her classes due her clumsiness; and is further hampered by Dame Devin and Delancy, who take a strong disliking to Blair and make several attempts to sabotage her. Blair perseveres and improves when she receives special tutoring from Headmistress Privet. While exploring the palace, Blair and her roommates happen upon a portrait of a young Queen Isabella and note her striking resemblance to Blair. Upon seeing another portrait depicting the late royal family (including Prince as a puppy) and learning that Blair was found by her adoptive mother on the same day the royal family died in a car crash, Isla and Hadley deduce that she is Queen Isabella's long-lost daughter, Princess Sophia, and the true heir to the throne. This discovery is overheard by Delancy. At dinner, Dame Devin announces a plan to demolish the poorer neighborhoods where Blair's family lives and replace them with new parks. She attributes this plan to Delancy, who appears conflicted. Blair almost decides to return home, but changes her mind and becomes determined to find the legendary crown of Gardania, which is said to glow when worn by the rightful heir. On the night before graduation, Dame Devin plants jewelry in Blair's room and accuses her and her roommates of stealing. The three of them are then ordered to be detained, only to escape with Delancy's help, who believes that Blair really is Princess Sophia. Blair, her roommates, and Grace sneak into the palace vault, but are caught by Dame Devin, who takes the crown and locks the girls inside. The next morning, Delancy attempts to stall her coronation; giving Isla enough time to deduce the vault code, allowing the girls to escape. Blair arrives at the coronation and makes a claim to the throne. Blair, her friends, and Dame Devin struggle to grab the crown which eventually falls into Delancy's hands. To her mother's dismay, Delancy places the crown on Blair's head. The crown glows and magically dresses Blair in a new gown, confirming her identity as Princess Sophia. Dame Devin angrily berates her daughter and inadvertently reveals that she orchestrated the deaths of Queen Isabella and her family so Delancy could inherit the throne. Dame Devin is arrested and Sophia/Blair elects Delancy as her Lady Royal. At a celebratory dance party