Main characters
- Andy Clark: (Emilio Estévez) Andrew is the film’s athlete, in detention for beating a fellow student and taping his buttocks together. Andrew, like Claire, is ashamed of being in detention and is used to the better end of social life at school. Andrew hates his father for pushing him so hard to succeed and even wants his bum knee to give so his father could not drive him to be the best athlete. He shares a kiss with Allison at the end of the film.
- Claire Standish: (Molly Ringwald) The princess of the group, in detention for skipping class to go shopping. She is used to being sheltered by her group of friends and doting parents who only pamper her in order to spite each other, a fact of which she is painfully aware. Claire is caught between her parents who seem to use her to get back at each other. Claire eats sushi for lunch. She shares a kiss with Bender at the end of the film, after much conflict between the two.
- John Bender: (Judd Nelson) The criminal of the group, in detention for pulling a false fire alarm. John Bender starts many of the events throughout the film. While he is hostile at first towards the others in the room with him, he defends Allison against Principal Vernon (”She doesn’t talk, sir.”). Despite Bender’s constant needling of the others in detention, they lie to Vernon to protect John after he escaped his solitary confinement (exacted when he allowed himself to get caught in the gymnasium while the others ran for it) and snuck back into the library through a ceiling vent. At home, John is a victim of child abuse, particularly by his father, who administered a cigar burn to his arm for spilling paint in the garage. His antics and smart mouth wind up earning him an extra eight weeks of detention.
- Allison Reynolds: (Ally Sheedy) The basket case of the group, in detention apparently because she had nothing better to do. She is the most socially isolated and claims to have no friends. She hides her face under her hair and the hood of her parka when frightened, and amuses herself by using her flakes of dandruff as snow on a picture she draws. For the first half of the film she is quiet, save for occasional squeaks of fear and a few random outbursts, but later on she opens up, particularly to Andrew. Allison’s lunch consists of a sandwich made with Pixie Stix powder and Cap’n Crunch cereal. She disgusts the others while making and eating it. She is the least hesitant to talk openly about her home life and is not afraid of being different. At home, Allison is a victim of child neglect by her workaholic parents, and as a result carries a large bag with her to school every day in case she feels like running away. She claims to be in therapy, but because of her compulsive lying it is unknown if her claim is true (considering that she had previously convinced Claire that she was a nymphomaniac who was sleeping with said therapist).
- Brian Johnson: (Anthony Michael Hall) The group’s brain, in detention for bringing a flare gun to school. He tries to keep the peace. At home, Brian is pressured by his parents to be a perfect academic. Every grade has to be an A, regardless of what the subject is. In an effort to get some relief, he takes shop on the mistaken assumption it will be easy. Brian, assigned to create a ceramic elephant lamp that will light when the trunk is pulled, receives an F when the lamp fails to light. In despair, he brings a gun to school with suicidal intent. It turns out to be a flare gun, which goes off in Brian’s locker, destroying the locker and the elephant, and landing Brian in Saturday detention. Brian uses the standard ‘girl from Canada’ story to escape ridicule for being a virgin.
- Principal Richard “Dick” Vernon: (Paul Gleason) The aggravated principal who mainly dislikes Bender because of his smart mouth and threats. In the movie, he is seen reading the private school files, for which Carl the janitor blackmails him $50. Despite this, he bonds with Carl, confessing various fears about the current generation. “Someday these kids are gonna be running’ the country. This is the thought that wakes me up in the middle of the night.”
- Carl Reed: (John Kapelos) The school janitor who tells the kids he is the eyes and ears of the school. He hears all of their conversations. A brief shot at the beginning of the movie reveals he was once voted “Man of the Year” when he attended the high school years before. Although Bender mocks Carl a bit (as he does with everybody), they end the day on a friendly note, Bender mentioning that he’ll see him next week. Carl seems, however, to be on friendly terms with Brian from the beginning.
