Maud is an 88-year-old Swedish woman living alone in a large, rent-free family apartment. She is financially secure, travels frequently, and places a high value on peace, quiet, and personal comfort. To the outside world, she appears frail and confused, but she is highly observant, independent, and fiercely protective of her meticulously ordered life.

Jasmin is a middle-aged artist living in a small ground-floor unit in Maud's building. The daughter of wealthy parents, she has lived a chaotic life involving two divorces, a tell-all autobiography, and struggles with substance use. She runs a blog showcasing her provocative, unconventional art and frequently pressures Maud into socializing.

Charlotte is Maud's older sister who experienced severe mental illness and lived with Maud for decades. Following their parents' deaths, she refused to leave the apartment or allow boarders, relying entirely on Maud for financial support and daily care.

Born Siv Hansson, Zazza is an adult film actress in her fifties preparing to marry an elderly, wealthy widower. As a former student of Maud's, she was known for skipping class and prioritizing socializing over academics. She has a loud, brash personality and enjoys drinking and commanding attention at the Selma Spa.

The Attorney is a wealthy, middle-aged man who recently moved into the apartment directly above Maud's. He is arrogant, frequently intoxicated, and physically and emotionally abusive toward his wife, creating loud disruptions that echo through the building.

Richard is an elderly retired journalist and former arts critic living in Maud's building with his wife. He is a slightly pompous but observant man who fancies himself an amateur sleuth due to his background writing crime novels and knowing a retired police inspector.

Herr Frazzén is a middle-aged antiques dealer who recently opened a shop near Maud's apartment building. He is well-regarded enough to appear on television as an appraiser, though his personal style features bleached hair in a ponytail and heavy cologne.

Gustaf is a 90-year-old wealthy widower from a noble family. In his youth, he was engaged to Maud but broke off the relationship when her family lost their fortune, an event that permanently altered the trajectory of Maud's life.

Irene Huss is a capable, observant police inspector called to investigate a serious incident in Maud's building. She displays immense patience when interviewing witnesses and works efficiently in a male-dominated profession.

Mary is Richard's second wife. She inherited an apartment in Maud's Gothenburg building, prompting Richard to move there after their quick courtship.