Professor Clarissa Dovey is the Dean of Good, and also Agatha's and Cinderella's fairy godmother. Clarissa originally teaches Good Deeds to Evers for the first year, but teaches Princeless Power in the second year at the School for Girls. For the majority of the third year, she was frozen in the Brig of Betrayers. She is known to be the most sought after Fairy Godmother in the world.
Clarissa is Lady Lesso's best friend and fellow dean. Their friendship runs deep, Lady Lesso going so far as to risk her life to protect Clarissa from Aric, for fear that he would destroy 'the one love she had in this world'. Lady Lesso dubs Clarissa as 'her Agatha'. When she dies in The Last Ever After, Clarissa weeps over her dead best friend.
Clarissa is Cinderella's fairy godmother. She gifts Cinderella her gown and her famous glass slippers to go to the ball, presumably to win Prince Kaleen's heart. What she doesn't know is that CInderella never wanted the prince, though she never finds out about this.
Clarissa is the presiding Dean when Agatha attends the School for Good. At first, their relationship does not extend more than a teacher-student one, but when Agatha scores 100% on a test almost every other Ever had failed, Clarissa has a talk with Agatha, which results in her asking her what would make her happy. Agatha replies that being beautiful would in fact make her life easier. Clarissa pretends to grant her wish, going so far as to make her believe that she'd changed her appearance entirely, only to reveal that it was all an elaborate ruse to show her that she had been beautiful all along. In the next two books, Clarissa acts as Agatha's guide and mentor.