Sadie is a highly educated former FBI agent who works as a spy-for-hire for private security firms in Europe. She speaks multiple languages fluently and approaches her espionage work with cold pragmatism and an unconventional moral code. Using an assumed identity as a translator, she integrates herself into the lives of her targets, utilizing manipulation, theft, and substance use to maintain her focus and handle the stress of her deceptive existence.

Bruno is an older, reclusive leftist intellectual and mentor to the local radical commune. Orphaned during World War II, he has experienced significant trauma and loss that ultimately drove him away from modern civilization entirely. He lives a solitary existence in a vast network of caves on a rural property, studying the region's underground springs and advocating for a return to the small-group, hunter-gatherer lifestyle of the Neanderthals.

Pascal is the fiercely ideological leader of the Moulinards, a radical anti-capitalist commune in the Guyenne region of France. Coming from an affluent Parisian background, he rejected an early interest in film in favor of fighting the region's transition to industrialized agriculture. He views himself as a serious revolutionary and commands his commune with an authoritative style, though he still relies on older mentors for philosophical guidance.

Lucien is a filmmaker and a childhood friend of Pascal Balmy. A vain man lacking in self-awareness, he believes himself to be engaged to Sadie, wholly unaware that she engineered their romance purely to gain access to Pascal. He is heavily focused on his art and his own self-image, making him an easy mark for Sadie's infiltration strategy.

Nadia is a veteran of radical leftist movements and a former member of Pascal's inner circle. After being voted out of the commune due to ideological friction, she lives in the ruins of a nearby castle with a truffle-hunting pig named Bernadette. She remains in the area out of spite, harboring deep resentment toward Pascal and eagerly criticizing his hypocrisy to anyone who will listen.

Rene is a member of the Moulinards and a former factory worker in Germany. As part of the commune's labor force, he engages in the group's physical work. He initiates a physical relationship with Sadie, which she accepts in order to extract information about the group.

Burdmoore is an American radical living on the French commune. Frustrated with the group's direction and suffering from a failing liver, he feels culturally isolated from his European peers. This dissatisfaction makes him a prime target for Sadie's efforts to incite extreme actions.

Aurelie is a member of the Moulinards who is initially suspicious of outsiders. Wary of Sadie's close relationship with Pascal and Lucien, she becomes a specific target for Sadie, who courts her friendship at a local swimming hole to break down her defenses.

Paul Platon is a deputy minister in the Guyenne region and a representative of the French state's push toward commercial agriculture. A vain and bad-tempered man known for his affairs, he becomes the focal point of the activists' planned disruptions and the central figure in Sadie's entrapment scheme.

Robert is Lucien's uncle and the family's landscaper. Protective of his nephew, he investigates Sadie's background and attempts to expose her lies, but he possesses personal financial secrets that make him highly vulnerable to her ruthless blackmail.

Jean is an older mentor figure to the Moulinards. He brings news from the outside world, specifically regarding local farmers' struggles and their opposition to the state's proposed water megabasins, helping the commune align their actions with local grievances.

Francoise is an extremist whom Pascal rejected from joining the Moulinards. Eager to participate in radical action, she and her partner accept payment from Sadie to help clear debris for a planned disruption, ignoring warnings that they are walking into a trap.

Denise is an extremist seeking entry into the region's radical circles. Rebuffed by the commune's official leadership, she willingly accepts a paid, risky assignment from Sadie to assist with a disruptive protest.

Agathe is Lucien's aunt and Robert's wife. She has a heart condition, a vulnerability that Sadie leverages when investigating the family's secrets to maintain her cover.

Vito is an associate of Sadie's who maintains remote contact with her during her assignment. He recommends obscure documentaries to her and eventually shares updates about Lucien's activities in Marseille.

Serge is Lucien's cinematographer. He carries the heavy family history of his grandfather, a refugee from French Algeria who faced intense discrimination in Marseille and eventually turned to radical right-wing politics.

Michel Thomas is a famous French novelist known for making incendiary public statements. He appears at the agricultural fair alongside Paul Platon in what Sadie assumes is a calculated publicity stunt.

Bruno's young daughter died decades ago in a tragic tractor accident on the family property. Her death shattered the family and served as a primary catalyst for Bruno's permanent withdrawal from organized society.

She is a member of the commune and Rene's romantic partner. She suspects Rene's infidelity and aggressively confronts Sadie, who casually denies the affair.