Jeanie is the younger sister of Ferris Bueller, the main character in the film Ferris Bueller's Day Off. She is portrayed as a high school student who often feels overshadowed by her brother's antics. Jeanie is skeptical of Ferris's charm and frequently expresses her frustration with his carefree attitude. Throughout the film, Jeanie's character evolves as she navigates her feelings of jealousy and isolation. She ultimately seeks her own identity and experiences moments of rebellion. Jeanie's interactions with other characters, including her parents and Ed Rooney, the school principal, highlight her desire for recognition and independence.