Cinderella

Cinderella is a character from a fairytale of the same name. She was raised from an early age by a wicked stepmother who made her work as a servant, until one day she went to the ball and got to dance with the prince.

Although references before several times, she appears as her own character in the opening of "Prunella Deegan and the Disappointing Ending", where she tells Marina that everyone knows how her story ends.