Blake leads a carefully constructed double life. Under the alias Joe, he runs a successful Paris-based vegetarian catering company and raises a family. Secretly, he operates as a highly efficient professional assassin, a career he started at age twenty. He operates without a moral compass, making decisions based purely on statistics and practicality.

Victor is a forty-three-year-old French author and translator. He maintains a jaded but humorous outlook on the publishing industry, accustomed to his own novels receiving critical praise but low sales. He carries a red Lego brick in his pocket to remember his late father, treating replacement bricks with the same reverence as the original.

Lucie is an independent film editor in her late twenties. She protects herself from emotional vulnerability after a past heartbreak, often keeping romantic partners at a distance. She is highly self-aware of her beauty and uses it to maintain control in her relationships.

André is a highly respected architect in his sixties, overseeing major international projects in New York and Mumbai. Despite his professional authority and extensive social connections, he struggles with deep insecurities regarding his aging body. He becomes infatuated with a much younger woman, resulting in a fragile romantic dynamic.

Born Femi Ahmed Kaduna, Slimboy is a Nigerian musical artist who achieves massive success by shifting away from auto-tune toward heartfelt pop. He writes music inspired by his family background in the Yaba district. Publicly celebrated, he privately wrestles with the pressure of hiding his sexuality in a conservative society.

Joanna is a driven lawyer from Houston, recently made partner at the prestigious firm Denton & Lovell. As a Black woman from a working-class background, she relies on fierce ambition to succeed in a corporate environment. She takes on morally gray cases specifically to fund expensive medical treatments for her ailing sister.

Sophia is an intelligent six-year-old girl with a deep fascination for amphibians. She lives in a household marked by extreme tension due to her father's aggressive behavior following his military service. She relies on her imagination and pets for comfort during difficult family moments.

David is a seasoned Air France pilot nearing retirement. He captains the turbulent Paris to New York flight that affects so many passengers. Shortly after the trip, he receives a terminal medical diagnosis, forcing him to quietly confront his mortality and the future of his family.

Adrian is an awkward but brilliant probability mathematician at Princeton University. Early in his career, he co-wrote a series of highly improbable emergency protocols for the government, mostly as an academic joke. He prefers the freedom of academic life over lucrative finance jobs.

Jamy is an experienced FBI agent who leads PsyOps, a department of psychological specialists. As a casual agnostic, she is uniquely qualified to handle religious issues and extremist threats for the agency. She prioritizes the psychological safety of civilians caught in unprecedented events.

Clark is Sophia's father, an army veteran who struggles to adjust to civilian life. His military service has hardened his personality, making him quick-tempered and intimidating to his wife and children.

Jacob is a heavily indoctrinated member of the Army of the Seventh Day, a militant religious faction. He is driven by fanaticism and views those involved in the aviation anomaly as religious abominations.

Flora is Blake's wife and a dedicated mother to their two children. She believes her husband is simply a successful caterer named Joe, experiencing their domestic life as completely ordinary and stable.

Clémence is Victor Miesel's dedicated publishing editor. She recognizes his genuine literary talent and worries about his cynical outlook, managing both his professional career and personal wellbeing.

Anne is a language professional who crosses paths with Victor Miesel at a translation event. Their brief interaction leaves a lasting impression, though poor timing prevents an immediate romance.

April is a mother attempting to maintain peace in a highly stressful household. She comes from a blue-collar background and feels trapped in her difficult marriage to an increasingly aggressive veteran.

Aby is a newspaper cartoonist whose work occasionally draws controversy. He is deeply supportive of his ambitious wife, offering an emotional anchor to her stressful corporate life.

Meredith is a confident British topologist who recently joined the Princeton mathematics department. She is amused by her awkward colleague and straightforward about her romantic interest in him.

Tina is a brilliant mathematician who co-authored emergency response protocols with Adrian when she was a doctoral student. She approaches serious government scenarios with a sense of academic irony.

General Silveria is a high-ranking Department of Defense official. He manages the complex logistical and security operations surrounding an unprecedented aviation event, relying heavily on academic experts.

Paul is a professional oncologist who faces the excruciating task of diagnosing his own brother with a terminal illness. He attempts to balance his medical expertise with family empathy.

Adriana is an aspiring actress cast as Juliet in a local production. She seeks media attention to boost her career but struggles to handle the intense public scrutiny that follows.

Louis is Lucie's young son. He enjoys a close bond with his mother but occasionally appreciates time away when she becomes overly attached to him.

Jody is a school teacher and the devoted wife of an airline pilot. She struggles to process the devastating news of her husband's sudden illness.

Betty is a pet toad belonging to a six-year-old girl. Her ability to survive extreme dehydration and enter suspended animation serves as a focal point for her young owner's attention.