Armand Gamache is the former head of homicide investigation at the Sûreté du Québec who has recently retired to the peaceful village of Three Pines. Seeking a quiet life after a traumatic career event, he establishes a structured daily routine with his wife, Reine-Marie. Despite his desire for rest, his deeply ingrained sense of duty prompts him to help his friend Clara search for her missing husband.

Clara is an artist in her forties who resides in Three Pines. Once mocked in art school for her unconventional installations, she eventually achieved significant fame and success late in life. She is currently grappling with anxiety over her husband Peter's failure to return after a mutually agreed-upon year-long separation.

Peter is an artist and Clara's estranged husband, raised in a cold and privileged family. Once a highly successful painter, his career stalled just as Clara's ascended, leading to a deep-seated jealousy that ultimately fractured their marriage. He has spent the past year traveling abroad in silence, prompting his wife's desperate search.

Professor Massey is a long-standing teacher at the Ontario College of Canadian Arts, where Clara and Peter studied decades earlier. He presents a warm, encouraging demeanor, contrasting with the cruelty of other faculty members from the past. He remembers the early dynamics of Peter and Clara's relationship and offers Clara a teaching position at the college.

Reine-Marie is Armand Gamache's wife, a supportive and loving partner who shares his desire for a peaceful retirement in Three Pines. She is perceptive, protective of her husband's healing process, and highly capable, often using her own research skills to assist in his investigations.

Jean-Guy is Gamache's son-in-law and a current investigator in Homicide Investigations. He has a history of addiction and shared trauma from his police work alongside Gamache. He remains intensely loyal to his former boss and readily volunteers to assist in the unofficial search for Peter.

Myrna is the local bookstore owner in Three Pines and one of Clara's closest confidantes. She is highly observant and protective, accompanying Clara on her daunting journey to Toronto to confront Peter's family and trace his footsteps.

Ruth is an eccentric, often cranky, but celebrated poet living in Three Pines. Despite her rough exterior and volatile behavior, she possesses deep insight into the artistic process and serves as an unexpected muse for Clara's portraiture.

Irene is Peter's mother, a cruel and manipulative woman who actively dislikes Clara. She believes Clara ruined her son's artistic potential by isolating him in a rural village and displays no concern over Peter's disappearance.

Thomas is Peter's wealthy and successful brother. He presents a facade of power to mask his weaknesses and shows complete apathy regarding his brother's whereabouts when questioned by Clara.

Marianna is Peter's rebellious sister and a poet. She maintains a strained relationship with her parents and uses her child's androgyny as a tool to frustrate her traditional family.

Bean is Marianna's twelve-year-old child, whose gender is deliberately kept secret by their mother. Bean holds onto the strange, unrefined paintings sent by Peter during his travels.

Marcel is a gallery owner in the picturesque town of Baie-Saint-Paul. He possesses an impressive art collection and offers the investigating group a place to stay, though Gamache quickly notes that Marcel's helpfulness masks a habit of withholding the full truth.

Professor Norman is a former teacher at the Ontario College of Canadian Arts known for his eccentric theories and history of tormenting vulnerable students. After losing his job, he relocated to Baie-Saint-Paul and operated under the mysterious alias "Noman."

Constable Stuart is a local policeman in Dumfries. He provides crucial early assistance to Gamache by identifying a bizarre, mystical garden location corresponding to one of Peter's mysterious paintings.

Vincent is a local resident who previously lived in Paris and volunteered at a charitable community for individuals with Down syndrome. His past choices provide Gamache with a crucial clue about Peter's own motivations for traveling to France.

Olivier is the co-owner of the Three Pines bistro alongside his partner, Gabri. Having previously experienced an absence from the village, he offers Clara insights into the anxiety of returning to a community that might have moved on.

Gabri co-owns the local bistro with Olivier. He is a warm, social presence in Three Pines who frequently participates in the community's gatherings and discussions.

Annie is the daughter of Armand and Reine-Marie Gamache, and the wife of Jean-Guy Beauvoir. She lives in Montreal and is deeply invested in the healing and well-being of both her husband and father.

Rosa is Ruth Zardo's beloved pet duck. She is a constant companion to the eccentric poet and a familiar presence in the daily life of the village.

Luc is an artist who owns a restaurant in Baie-Saint-Paul and previously resided at Noman's isolated artists' colony. He travels annually for painting trips and remains a mysterious link to the disbanded commune.

Bert is Irene Morrow's second husband. Unlike his wife, he shows a flicker of genuine concern regarding his stepson Peter's disappearance, though he lacks any actionable information to help the search.