Cady Heron is introduced as the main character through a description of her overly protective parents documenting her first day of school at age 16. This foreshadows how her parents will be affected by her bad decisions. The audience learns Cady comes from an average family, contrasted later by the huge mansion of one of the mean girls, implying popularity requires wealth. Cady breaks the fourth wall to convey her future power and dominance. She narrates her unhappy life being homeschooled, fearing the stigma of being a "freak." Non-diegetic happy music plays to contrast the tone of Cady's narration and set an optimistic tone for the film.