Ally Sheedy's character in The Breakfast Club, Allison Reynolds, is in detention because she has no friends and rarely speaks. She is considered a social outcast and her appearance and behavior reinforces this. In the movie, she spends most of her time drawing and covering herself with her coat, which isolates her from the other students. It is unclear what specific rule she broke, but it is likely that she skipped school or arrived late. Her forced interaction with other students during detention leads to her having a breakthrough moment where she discovers more about herself and starts to connect with her peers.