Girl, Interrupted

Girl, Interrupted does not follow a linear storyline, but instead the author provides personal stories through a series of short descriptions of events and personal reflections on why she was placed in the hospital. She begins by talking about the concept of a parallel universe and how easy it is to slip into one, comparing insanity to an alternate world. She discusses how some people fall into insanity gradually and others just snap. Kaysen also details the doctor's visit before first going to the hospital and the taxi ride there at the beginning of the book before launching into the chronicles of her time at the hospital.

Susanna Kaysen

The autobiographical main character, Susanna Kaysen is admitted to a psychiatric ward to be treated for borderline personality disorder following a suicide attempt. She voluntarily admits herself after a short consultation with a psychiatrist who is also an acquaintance of the family. She is told that she will only be staying there for a few weeks, but it turns out to be one and a half years instead. Throughout the book, she frequently contrasts the time of the consultation, twenty minutes, to the time she ended up spending there.

Lisa Rowe

Lisa is diagnosed as a sociopath, but whether she actually is one is left open to interpretation. Lisa periodically escapes from the hospital, only to be found a day or two later and re-admitted. She is usually happy enough to be back though she does put up a fight when restrained. She is an ex-junkie who never sleeps and barely eats, and enjoys making trouble for the staff. She apparently takes some pride in her diagnosis. Although she has a therapist assigned to her, she never actually sees him. Lisa is not in contact with her family except her brother, but the extent of their contact is not described. She also has a lawyer, though it appears he is mostly used to threaten the staff if she doesn't get what she wants. Her behavior is wildly unpredictable, and while she can be kind, she is also capable of cruelty towards the other patients. For example, Lisa has an ongoing rivalry with Lisa Cody that ends in Lisa Cody reverting to drugs.

Polly Clark

Polly is a disfigured patient who was hospitalised for schizophrenia and depression. Polly has severe scarring on her body, the result of setting herself on fire. According to Kaysen, because of the sheer guts it took to actually do it, Polly is highly respected for her courage, to the extent that none of the patients will ask why she did it. During her first year at the hospital, she appears calm and even cheerful: "Life was hellish, she knew that. But, her smile hinted, she'd burned all that out of her."[6] But one day she suddenly breaks down and begins to scream inconsolably, as if realizing for the first time her appearance and the permanency of it. Kaysen then realizes that while the other patients might be released from the hospital, Polly is trapped forever in her scarred body.

Georgina Tuskin

Hospitalized for schizophrenia,[6] Georgina is Susanna's roommate at the institution. The two of them are considered the healthiest patients on the ward and are good friends throughout the book. Georgina apparently experienced her first symptoms after an episode in a movie theatre where she suddenly felt as if the darkness had surrounded her completely. It is not clear what the immediate reason for her diagnosis is. She also has a boyfriend in the hospital named Wade.

Lisa Cody

Lisa is admitted to the ward after Susanna, and from her first days there she looks up to Lisa Rowe. She, too, is diagnosed as a sociopath, though Rowe questions this and is clearly annoyed that she is no longer the only sociopath there. A former drug addict like Rowe, she tries hard to defend herself from Lisa Rowe's accusations that she isn't "real". She eventually escapes and is apparently found by Lisa Rowe during one of her escapes from the hospital. Lisa tells the other girls with pride that Lisa Cody has become a "real" drug addict. Her fate after her escape is not described any further.

Daisy Randone

Daisy is a thin girl who arrives before Thanksgiving each year, staying through Christmas. She has a single room, where she spends most of her time. The other girls think she is addicted to laxatives. She eats only chicken, and does so only in her room. However, after letting Lisa into her room, Lisa reports back to the rest of them that she only needs the laxatives because of all of the chicken. She peels off the meat and keeps the carcasses, saying that when she has 14 carcasses, it is time to leave the hospital, possibly due to obsessive–compulsive disorder. Daisy's father visits her quite often, and it is implied he has incestuous feelings for her. Daisy eventually commits suicide on her birthday. Susanna describes her as "sexy" and says Daisy had a spark that the rest of the girls lack. Daisy is reclusive and often refuses to be social. She hates it when anyone goes near her and is hostile when people approach her. However, she does allow Lisa to enter her room. Sometimes they even share cigarettes, indicating that Daisy does respect Lisa out of all the other patients on the ward.

Torrey

Torrey is a former drug addict. She was put into the ward after her parents discovered her promiscuity. She is the best friend of all the fellow patients. Her parents take her out against her will, and take her back to Mexico, where she believes she will become an amphetamine addict again. She describes Mexico, saying "being in Mexico means being dead and shooting speed to feel like you're not quite dead" (Kaysen, 97). The girls do try to help her with an escape plan and pool their money for her to help her, but eventually that plan is ruined, partly by Torrey herself, as she is too afraid to do it, and partly by Valerie after she gives Torrey a cup of thorazine just prior to her departure to calm her down. Though she only appears for a short time she is an important character. Kaysen distinguishes between those put there indefinitely by parents willing to pay without questioning the progress of their treatment and those whose parents are not willing to do so. Torrey is used as an example of the latter group.

Alice Calais

At first Alice seems quiet and, in Kaysen's words, "not too crazy"; but after about a month she breaks down and is taken to maximum security. When the girls go to visit her they find that she has painted herself and the walls in her seclusion room with her own feces. Most of the other patients believe she was "raised in a closet" because she is ignorant about the trivial things in life. For example, she has never tasted honey and doesn't know how it tastes. She is also completely unaware that her last name is a well-known location in France and is overwhelmed in awe when she hears of the Hundred Years' War. It is not explained what happens to her after the girls visit her.

Wade

Wade, Georgina's boyfriend, is also a patient. Wade entertains the female patients with stories about his father, who he claims to be a CIA agent. He is prone to violent outbursts, which eventually results in his being moved to the maximum-security ward.

Cynthia Crowley

A severely depressive patient who undergoes weekly electroconvulsive therapy.[6] There are only a few references to her in the book and she isn't a major character in it.

Valerie

The head nurse on the ward. She works there during the day and though she can be strict she is generally liked by the patients and Kaysen in particular. She is described as down to earth and rarely uses the psychiatric terms used by the therapists, which is something that Susanna herself despises. Kaysen recalls her as honest and direct.

Mrs. McWeeney

The evening nurse on the ward. Described as the exact opposite of Valerie and very much disliked by the patients. Kaysen recalls her as "clearly nuts". Valerie does not like her and tends to ignore her, although she does describe her as a professional when the patients complain to her.

Dr. Wick

The consultant psychiatrist. She is described as very old-fashioned and easy to embarrass. Susanna purposely tries to embarrass her, deliberately saying things that she knows Dr. Wick will react to, during their sessions together. She has previously worked in Africa and her direct contact with the patients is very limited, talking to them for only a matter of minutes in a session.

Melvin

Kaysen's late therapist and analyst. Susanna says that the two of them used to be good friends and that she once enjoyed sessions with him. According to her, he was old, balding, and slightly unattractive. Susanna would go into his office sometimes and just sit there in silence because there wasn't very much silence in the hospital and she needed a break. However, this relationship was short-lived; Melvin rolled into the hospital parking lot, and, when greeted enthusiastically by Susanna, refused to entertain her. Her opinion of him spiraled downward from that point.