Eunice Pertridge is a pre-made Sim living in Hidden Springs with her mother Lonnie, her sister Astrid, and her stepsister Ella. She and her mother are very alike, sharing three traits. Eunice is an extremely evil and clever woman, and she wishes to marry the "prince" (Sebastian Vanderburg, who is referred to as the prince of the Vanderburg family), and that would only be the beginning. She is friends with her mother and her sister, and dislikes her stepsister. She is acquaintances with the prince's mother, Catarina Vanderburg and his stepfather, Renauld Vanderburg.
Eunice and her family are thought to be parodies of the fairy tale, "Cinderella." Eunice would be the ruthless stepsister, probably based on Drizella Tremaine who, along with her mother, mistreats her stepsister, giving her a poor room and using her as a maid while Lonnie and her sister try to marry to rich and powerful heirs.