Maggie is a 60-year-old retired CIA operative living a quiet life on Blackberry Farm in Purity, Maine. She maintains a cover story as a former textile expert for an import-export company. Highly trained and permanently cautious, she relies on her small group of fellow retired spies for companionship while keeping her distance from the local townsfolk.

Jo is the acting police chief in Purity, Maine, having taken over after the previous chief was injured. She is a Purity native who knows the townspeople intimately. Observant and authoritative, she refuses to let state detectives or mysterious retirees dismiss her investigative skills.

Diana is a ruthless and highly capable CIA operative responsible for Operation Cyrano. She operates with a cold, analytical focus and prioritizes mission success over personal relationships or collateral damage. In the past timeline, she recruits Maggie for an assignment that permanently alters both of their lives.

Declan is a 68-year-old retired CIA operative living in Purity, Maine. He maintains the appearance of an academic, having worked as a history professor before his recruitment into the Agency. He went through training with Maggie decades earlier and remains fiercely protective of her.

At 73, Ben is the oldest member of the Martini Club and acts as the unofficial mayor of their retired spy circle. During his CIA career, he posed as a hotel supplies salesman to build an extensive information network. He was the first of the group to settle in Maine and convinced the others to follow.

Danny is a doctor who spent years working in refugee camps before taking a lucrative job as a concierge physician in London to support his mother. He meets Maggie during her undercover assignment, unaware of her true profession, and their relationship becomes deeply serious despite her secrets.

Ingrid is a retired CIA operative who masks her formidable technology and cipher-cracking skills behind the appearance of an elegant Park Avenue matron. She leverages her harmless, grandmotherly appearance to gather security footage and information from unsuspecting locals.

Lloyd is a retired government analyst and Ingrid's husband. He brings his analytical skills to the Martini Club's unofficial investigations. He possesses a deep appetite for food and life, frequently acting as the group's resident chef during their meetings.

Luther is Maggie's neighbor, a retired MIT mechanical engineering professor who now lives as a somewhat disheveled farmer. He is fiercely protective of his privacy and deeply loyal to Maggie, refusing to share information about her with the local police.

Callie is Luther's 14-year-old granddaughter, whom he has raised since she was a toddler following her mother's death. She is practical, homeschooled, and comfortable with the harsh realities of farm life. She admires Maggie and actively seeks a female influence in her life.

Bella is Phillip Hardwicke's 15-year-old daughter in the past timeline. She feels trapped in her father's wealthy, isolated world and awkwardly attempts to connect with Maggie. She is observant and desperate for genuine connection.

Hardwicke is a wealthy, controlling businessman who launders money for Russian oligarchs. He employs Danny as his personal concierge doctor to manage his seizure disorder. He operates with heavy security and investigates anyone who enters his inner circle.

Bianca is a mysterious operative seeking information on Diana Ward and Operation Cyrano. Her desperate attempt to recruit Maggie ends fatally when she is murdered and left in Maggie's driveway.

Gavin is a veteran CIA operative with nearly 30 years of experience who worked alongside Maggie during her time in Turkey. He operates under the cover of an agricultural equipment expert.

Alfond is a State Police Detective who takes over the investigation of the body found at Maggie's farm. He is condescending and immediately dismisses Jo's authority and expertise based on her gender and small-town status.

Dr. Wass is the medical examiner handling the initial investigation of Bianca's body. Unlike Detective Alfond, he respects Jo's intelligence and allows her to observe his autopsies.

Doku is one of Maggie's informants in Turkey, providing intelligence on weapons shipments. He is deeply aware of the danger his work places him in and expresses fatalistic resignation about his odds of survival.

Silvia is an Italian woman who serves as Phillip Hardwicke's beautiful companion and lover during the past timeline.

Megan is a lifelong resident of Purity who suffers from chronic abuse at the hands of her husband. Jo Thibodeau interviews her after a domestic violence incident.

Jimmy is Megan's abusive husband in Purity, Maine. He is stabbed with a steak knife during an altercation early in the story.