Andy is a former investment banker whose stoic, self-possessed demeanor worked against him during his murder trial. Inside Shawshank, he maintains an air of quiet dignity that sets him apart from the rest of the prison population. He adapts to his harsh environment by leveraging his financial expertise to assist the prison guards, carving out a unique position of usefulness. He occupies his time with rock-polishing and studying posters of pinup girls.

Red is an inmate serving three consecutive life sentences for a murder he readily admits to committing. Coming from a working-class background, he is highly observant and understands the complex social hierarchy of the prison. As the resident smuggler, he maintains a small degree of power and respect among the inmates. He acts as the narrator for Andy's story, watching his friend's quiet endurance with a mix of awe and skepticism.

Todd is a 13-year-old boy who presents as a healthy, golden-haired, all-American teenager. Beneath his bright smile, he harbors a dark, visceral obsession with the atrocities of World War II concentration camps. He uses his innocent appearance to manipulate the adults around him, functioning without genuine emotional attachments. When he recognizes a local retiree as a former Nazi commandant, Todd initiates a twisted blackmail arrangement to satisfy his curiosity.

Dussander is an elderly former Nazi concentration camp commandant living quietly in suburban America under an assumed identity. He is physically gaunt and initially defensive when Todd discovers his secret. Although he claims he was only following orders during the war, he lacks genuine remorse for his actions. As Todd forces him to dredge up memories of his brutal past, Dussander begins to experience a dark nostalgia that reawakens his violent impulses.

Gordon is a 12-year-old boy growing up in Castle Rock, struggling to find his place in a family that largely ignores him following the death of his older brother. He is intelligent and highly creative, often entertaining his friends by spinning elaborate fictional stories. These stories serve as a vital outlet for him to process his complicated feelings of grief and insignificance. He joins his friends on a solemn quest to find a missing boy's body in the woods.

Chris is a 12-year-old boy who comes from a family notorious in Castle Rock for criminality and alcoholism. Despite the town's assumption that he is a delinquent, Chris is deeply intelligent, compassionate, and acts as a peacemaker among his friends. He carries the heavy burden of his family's reputation but possesses a strong sense of justice and a protective instinct toward Gordon.

David is a 73-year-old mid-level lawyer who narrates his experiences with an exclusive, unnamed gentlemen's club. Despite a comfortable marriage, he harbors a quiet sense of dissatisfaction with his ordinary life. He finds fulfillment in the mysterious club, drawn to its vast library and the Thursday night storytelling tradition. He prefers to accept the club's strange realities without asking too many questions.

Emlyn is a retired doctor and a respected member of the mysterious storytelling club. He acts as the nested narrator of the novella, recounting a medical case from 50 years earlier. He views the processes of pregnancy and childbirth with profound reverence, describing them as an unstoppable biological engine.

Teddy is an impulsive 12-year-old boy known for taking extreme physical risks, such as dodging oncoming trains. He wears hearing aids due to severe burns on his ears inflicted by his mentally ill father. Despite the abuse he suffered, Teddy is aggressively defensive of his father's military record and will fight anyone who insults him. He approaches the group's quest as another opportunity for a dangerous thrill.

Vern is a somewhat timid 12-year-old boy who sets the plot in motion after eavesdropping on his older brother. He learns the location of a missing boy's body and convinces his friends to hike out to see it. Though he is easily frightened and often the target of mild teasing, he views their journey with a sense of solemn duty.

Sandra is a patient in Dr. McCarron's story who faces severe societal prejudice for being an unmarried, pregnant woman in a less forgiving era. She loses her job and housing but remains fiercely dedicated to delivering a healthy baby. She rigorously practices Dr. McCarron's experimental breathing method to help her manage physical pain and control her temper against public scorn.

Bogs is an aggressive inmate at Shawshank State Prison who leads a predatory gang known as the Sisters. He relies on intimidation and physical violence to dominate vulnerable prisoners, focusing his violent attention on Andy until he is brutally stopped.

Hadley is a brutal guard at Shawshank prison who accidentally discovers Andy's value. When Andy offers a legal loophole to save Hadley's inheritance from taxes, Hadley agrees to provide cold beer for the inmates, inadvertently cementing Andy's legendary status among the prisoners.

Stammas is a corrupt prison warden who institutes a system of illegal profits using inmate labor. He recognizes Andy's financial acumen and forces him to launder the prison's illicit money, rewarding Andy with protection and resources for the prison library.

Dick is Todd's father, a man who prides himself on maintaining an open, friendly relationship with his son while remaining entirely oblivious to Todd's true nature. He is financially comfortable but holds superficial values, frequently using racist slurs in casual conversation while considering himself a good parent.

Monica is Todd's mother, a woman who values the appearance of a healthy family dynamic over deep investigation. She notices Todd's nightmares and weight loss but easily accepts superficial explanations, congratulating herself on raising a well-adjusted child.

Ed is the school guidance counselor who attempts to intervene when Todd's academic performance plummets. He is a diligent educator who is completely fooled when an elderly man shows up posing as Todd's grandfather to handle the situation.

Billy is Vern's older brother, a teenager who participates in local delinquency. He discovers the missing boy's body while joyriding in a stolen car, prompting him to keep the discovery a secret to avoid police attention.

Milo manages the town dump in Castle Rock, guarding the property with a notorious dog named Chopper. He is a harsh, aggressive adult who takes pleasure in taunting the local children, specifically targeting Teddy with cruel remarks about his mentally ill father.

George is a senior partner at the law firm where David works. Recognizing a quiet, unfulfilled quality in his employee, he acts as the catalyst for David's entry into the secretive gentlemen's club on 35th Street.

Stevens is the ageless factotum of the gentlemen's club. He manages the sprawling, impossible architecture of the building and serves the members, maintaining an air of polite mystery while warning guests not to ask too many questions about the nature of the club.