Pendergast is an independently wealthy FBI special agent with a highly refined Southern demeanor. He possesses keen observational skills and employs obscure techniques, such as Tibetan visualization rituals, to profile criminals. Operating outside standard Bureau protocols, he relies heavily on his own deductions to investigate a strange murder in Mississippi.

Chambers is a senior FBI agent crippled by depression following his wife's sudden death in a car accident. He spends his days in a fog of apathy, ignoring his paperwork and contemplating his sidearm. Assigned as a mentor to a new, eccentric partner, he slowly finds his attention drawn back into the world of active investigation.

Proctor is a disciplined former Navy SEAL working for a private security firm. He possesses extensive combat training from his time in a classified military unit called the Ghost Company. After a lapse in vigilance at his suburban home, he is locked inside a dark, padded cell, where he immediately implements strict physical routines to maintain his sanity and agency.

Wickman is a physically fit, highly organized man who manages a subterranean surgical facility hidden beneath a dilapidated Louisiana property. He enforces strict rules regarding diet and physical safety for the men he detains. His actions are driven by an obsessive fixation on his captives' physical health, specifically their right arms.

Dr. Magnus is a wealthy, charismatic bioengineer and prominent figure in New Orleans society. He hosts lavish galas and oversees the restoration of a 19th-century steamboat named the Fantôme. He projects an air of sophistication and philanthropy, though he regards most people with intellectual disdain and harbors a deeply manipulative nature.

Dr. Telligren is a distinguished gray-haired professor at Tulane University. He previously supervised an ambitious parapsychology program that explored surgical interventions on student volunteers. He currently attempts to maintain his academic reputation while distancing himself from past controversies that threaten to resurface.

Special Agent in Charge Estevez runs the FBI's New Orleans field office. He is a pragmatic administrator focused on maintaining institutional order and his own career trajectory. He strictly enforces Bureau protocol and shows little patience for agents who operate outside the established chain of command.

Assistant Special Agent in Charge Urbanski is an administrator at the New Orleans FBI field office. He pushes a culture of internal reporting while engaging in illicit side deals, specifically attempting to sell confiscated evidence. His corrupt practices make him the immediate target of internal scrutiny.

Foreman owns and operates a discreet, highly secured courier service for wealthy clients in East New Orleans. He is anxious and paranoid about security breaches, maintaining strict anti-fraternization policies among his ex-military staff. He relies heavily on surveillance to manage his employees.

Ledbetter is a local law enforcement official who presides over long-term storage records for cold cases. He initially dismisses a past murder as a simple mob killing and resists assisting federal agents until his ego is successfully stroked.

Sophie is a jeweler who previously studied chemistry at Tulane University in the 1980s. She provides critical background information to investigators about a former boyfriend's sudden, drastic personality shift during his graduate school years.

Lucius is the younger brother of a murder victim. He harbors intense anger over his brother's death but provides logical counterarguments to law enforcement theories regarding the specific methods used by the killer.

Kroker is the unethical director of Kroker Brothers Funeral Home. He routinely overcharges grieving families, cuts corners on equipment, and illegally dumps embalming chemicals. He is highly uncooperative when questioned by law enforcement about past employees.