An aging, legendary former Texas Ranger who now works as a bounty hunter for Eastern railroad tycoons. He strictly adheres to an old frontier code of loyalty and duty, preferring functional weapons and practical survival methods over anything flashy. He silently struggles with physical aging—including arthritis and poor eyesight—which increasingly hampers his ability to hunt dangerous men in a modernizing world.

A cold, meticulous young outlaw who preys upon the new railroad lines crisscrossing the border. Driven by a deep resentment stemming from a traumatic childhood—including being sold to the Apache by an abusive stepfather—Joey kills from a clinical distance using a German rifle with a telescopic sight. He values beautiful objects, stealing gold and trinkets to hoard in a hidden cave.

An educated schoolteacher and fiercely protective matriarch living in the Texas Panhandle. She has overcome a traumatic past as a captive and sex worker to build a stable, loving domestic life with her family. Lorena bitterly resents the violent frontier world and fights actively to keep her husband away from Captain Call's influence.

A gentle, illiterate farmer and former corporal of the Texas Rangers. He is profoundly dedicated to his wife and five children, finding himself torn between the peace of his domestic life and his deeply ingrained sense of duty to his old commander. He frequently defers to Lorena's judgment, recognizing her intelligence and strength.

An accountant from Brooklyn sent by the railroad to manage expenses on the hunt for Joey Garza. Completely unsuited for the harsh elements of the Texas frontier, Brookshire views the world through ledgers, budgets, and corporate hierarchy. Despite his lack of practical skills, he attempts to do his duty out of a stubborn sense of obligation.

A resourceful and resilient midwife living in Ojinaga. Having survived severe trauma, abuse, and the executions of her father and brother, Maria possesses an unbreakable will. She is intensely devoted to her children, undertaking dangerous journeys alone on foot just to ensure their safety, even for the son who openly despises her.

A sadistic killer known infamously as "the manburner." He leads a violent gang of outlaws and derives sick pleasure from burning his victims alive. His sudden reappearance in the West creates a new, chaotic threat for lawmen and settlers alike.

An aging, notoriously volatile gunfighter who represents a relic of the West's violent past. Holed up in the lawless settlement of Crow Town, he views the new generation of outlaws and the aging generation of lawmen with equal parts cynical contempt and racist disdain.

An aging, nearly blind former scout who struggles heavily with alcohol addiction. His once-prized frontier skills have completely deteriorated, but he retains a battered decency through his steadfast, unrequited devotion to Maria and her children.

A legendary former Texas Ranger turned wealthy, pragmatic cattle rancher. He serves as a peer to Captain Call, though Goodnight has adapted to the industrialized changes transforming the frontier rather than fighting them. He provides crucial support to Lorena and Pea Eye.

An elderly, legendary Kickapoo tracker known for never failing to find his target. He possesses preternatural abilities to read the earth and signs of passage. He agrees to guide Pea Eye to Call in exchange for the promise that Lorena will teach him to read books.

The blind daughter of Maria Garza. Despite her lack of sight, she is highly perceptive, gentle, and acutely aware of the dangerous world around her. She provides a sense of innocence and calm amid the violent borderlands.

A young, eager deputy from Laredo. Honored to be personally selected by the legendary Captain Call, Plunkert joins the dangerous posse despite the deep despair it causes his pregnant wife. He struggles with his own fears and the brutal realities of the trail.

The sixteen-year-old pregnant wife of Deputy Ted Plunkert. Devastated by her husband's sudden departure, she feels a profound sense of despair and isolation in Laredo, viewing Call only as a stranger destroying her family's happiness.

Maria Garza's son, who has a mental disability. He relies heavily on his mother's fierce protection and the insulated environment of their village to survive.

A wealthy railroad president who operates out of the East. He represents the encroaching corporate interests that prioritize ledgers, profits, and commercial infrastructure over the dying codes of frontier justice.

A resilient Nebraska rancher and a steadfast friend to Lorena Parker. She provides a vital support network, willingly stepping in to help manage Lorena's children during turbulent times.

The hard, self-interested sheriff of Presidio. Devoid of a moral code, he defies Captain Call's authority in a petty attempt to capture Joey Garza himself for the resulting fame.