Martha is a 79-year-old resident of the Diamond House retirement home who becomes deeply frustrated with its profit-driven decline in living conditions. She decides that life in a Swedish prison would offer better food and exercise, leading her to form the League of Pensioners with her four closest friends. She acts as the group's chief strategist, using the societal invisibility of the elderly to plan daring heists.

Brains is an 80-year-old former workshop owner and the resident inventor among the friends. He suffers from a lack of intellectual stimulation at the retirement home and eagerly embraces the challenge of engineering their criminal schemes. He provides the technical know-how for their operations, modifying walkers and designing custom gear.

Rake is a charming former sailor and gardener who initially complains about Martha's schemes, preferring a quiet retirement. Despite his grumbling, he possesses a deep-seated loyalty to his friends and an underlying thirst for adventure. He frequently uses his worldly charm to reassure the others when they grow nervous.

Christina is a 77-year-old former milliner with refined tastes and a strict religious upbringing. She is initially the group's moral objector, worried about breaking the law and what her family will think. She eventually discovers a hidden desire for excitement and contributes her artistic skills to their heists.

Anna-Greta is a tall, pragmatic former bank clerk with a sharp mind for numbers and a distinctive laugh. She is highly focused on financial logic, calculating the costs and potential profits of the group's plans. Her strict exterior softens as she embraces the thrill of the heists and discovers new romance.

Nurse Barbara is the stern manager of the Diamond House retirement home who enforces ruthless cost-cutting measures. She routinely medicates the residents to keep them docile and manageable. Her primary motivation is professional ambition and securing a romantic relationship with her wealthy boss.

Director Mattson is the married owner of the Diamond House retirement home who views the facility purely as a profit-making business. He implements policies that strip away the residents' activities, food quality, and basic comforts to maximize his financial returns. He relies on his manager to execute these harsh rules while remaining largely in the background.

Chief Inspector Petterson is an experienced police officer baffled by a string of unconventional crimes. He is highly skilled in standard law enforcement but completely blinded by ageist assumptions. He is unable to fathom that a group of elderly citizens could execute sophisticated robberies.

Inspector Strömbeck is a police investigator working alongside Petterson. He frequently dismisses vital clues, such as handwritten signs with fingerprints, assuming they are mere dead ends.

Inspector Lönnberg is a dismissive police officer who handles initial reports. He ignores a call about five missing pensioners, assuming they simply went on an unauthorized trip, and throws his notes in the trash.

Petra is a young art student who works as a cleaner to support herself. Unaware of their true value, she removes stolen masterpieces from a hotel suite because she finds them aesthetically boring. Her actions inadvertently throw the pensioners' carefully laid plans into chaos.

Liza is a hardened career criminal who attempts to establish dominance over newer inmates at Hinseberg Women's Prison. She operates entirely on self-interest and tries to intimidate others into giving her a cut of their illegal profits.

Katia is a kind, temporary nurse at Diamond House who treats the residents with respect. She becomes genuinely concerned when the five friends go missing from the facility and attempts to alert the authorities. Unfortunately, her earnest reports are entirely ignored by the local police.

Juro is a Yugoslav gangster and career criminal who views prison sentences merely as brief rests between jobs. He attempts to recruit other inmates for aggressive heists involving weapons and violence.

Dolores is a 93-year-old resident at Diamond House whose son works on the ferries. She constantly pushes a specific shopping trolley, claiming it contains millions from her son.

Gunnar is a widower who connects with Anna-Greta during a ferry trip. He relies on a hearing aid, making him entirely unbothered by Anna-Greta's booming laugh.

Anders is Christina's adult son. Upon learning of his mother's criminal exploits, his initial shock quickly turns into opportunistic speculation about his potential inheritance.

Emma is Christina's adult daughter. Like her brother, she is shocked by her mother's sudden disappearance but soon becomes highly interested in the financial windfall it might bring.

Nils is a seaman and Rake's son. He becomes enraged when he discovers his father has been missing for days without the staff noticing, prompting him to file a formal police report.