Evan is a highly trained former covert government assassin who now operates independently as the Nowhere Man. Working from a heavily fortified penthouse in Los Angeles, he uses his lethal skills to assist desperate individuals who have nowhere else to turn. He adheres strictly to a personal moral code known as the Commandments, which helps him manage a violent existence and retain his humanity.

Jack is a sturdy, experienced operative who acts as Evan's mentor and handler within a clandestine government program. He recruits Evan from a difficult childhood and oversees his brutal training regimen. Despite preparing Evan for a life of violence, he actively works to preserve the boy's underlying empathy and humanity through philosophical lessons.

Charles is a highly skilled operative who was trained in the same clandestine government program as Evan. Unlike Evan, he fully embraces the dehumanizing and ruthless aspects of their education. He operates with an ideology of absolute obedience and efficiency, believing that any means are justified to complete an objective.

Danny is a physically imposing and highly competent professional operative managing a dangerous extortion operation. He employs sophisticated technological tools and coordinates teams of mercenaries with methodical precision. His skills and resources make him a particularly formidable adversary for anyone who crosses his path.

Katrin is a terrified woman who reaches out for help, claiming she owes a massive debt to an underground gambling operation. She reports that her father has been taken hostage by ruthless individuals demanding payment. Operating under extreme distress, she places her trust in a mysterious vigilante to save her family.

Mia is a widowed district attorney living in the Castle Heights residential tower. She handles the immense pressures of single parenthood and the demands of a high-stakes legal career simultaneously. Her chaotic, warm domestic life stands in sharp contrast to the sterile isolation of her secretive neighbor.

Peter is Mia's eight-year-old adopted son, an energetic and curious boy dealing with a bully at school. He is highly observant and quickly takes a liking to his mysterious neighbor, Evan. His innocent presence often disrupts the rigid boundaries of the adults around him.

Candy is a lethal and sadistic professional assassin working alongside Danny Slatcher. She experienced a difficult childhood and resolved to seize control of her life through brutal means. She approaches her violent profession with enthusiasm and a chilling detachment.

Morena is a 17-year-old resident of Boyle Heights who acts as the primary caregiver for her younger sister following their mother's death. She lives in constant fear of a corrupt police officer who sexually exploits young women in her neighborhood. Finding herself completely failed by the legal system, she makes a desperate call for outside help.

Tommy is a nine-fingered armorer based in Las Vegas who supplies customized, untraceable weapons to black-ops groups. He maintains a cautious but respectful business arrangement with his most discreet clients. He operates with a high degree of paranoia, thoroughly checking for surveillance at all times.

Bill is a corrupt LAPD detective assigned to the Gang and Narcotics Division. He uses his authority to systematically exploit vulnerable young women in Boyle Heights, shielding himself behind his badge. He maintains control through intimidation and the physical branding of his victims.

Carmen is Morena's 11-year-old sister, an innocent girl targeted by a corrupt local authority figure. She depends entirely on her older sister for safety and stability following the loss of their parents.

Ida is a stubborn, elderly widow living in the Castle Heights residential tower. She is heavily involved in the mundane politics of the building's homeowners' association and frequently pesters her neighbors about trivial matters.

Hugh is the officious president of the Castle Heights homeowners' association. He takes his administrative duties very seriously, actively monitoring attendance at meetings and enforcing building rules.

Johnny is a resident of Castle Heights who practices martial arts. He is enthusiastic about his training but inadvertently invites trouble when an altercation during class spills over into his personal life.

Sam is Katrin's father, a construction manager based in Las Vegas. He is held hostage by a dangerous operation attempting to force his daughter to pay a massive debt, keeping his composure despite the danger.

Memo is an undocumented immigrant and desperate father who finds himself trapped by ruthless drug dealers. They force him to store narcotics in his workshop by threatening the life of his vulnerable daughter.

Isa is Memo's teenage daughter, who has Down syndrome. She is used as leverage by drug dealers to force her father's compliance, displaying gentle resilience despite her terrifying circumstances.

Michael is a recently released convict who was previously prosecuted by Mia Hall. He seeks revenge against her, breaking into her home before being violently intercepted.

Axel is a former convict seeking retribution against the district attorney who prosecuted him. He assists Michael Marts in a terrifying home invasion at Castle Heights.

Reza is a man who suffers a broken nose during a martial arts class altercation with Johnny Middleton. He arrives at Johnny's building with his older brothers seeking violent retaliation.

Strider is Jack Johns's loyal pet dog. He provides quiet companionship to Jack in his Virginia farmhouse during Evan's formative years in the training program.

Clara is Jack Johns's late wife. Her maiden name, Smoak, is given to Evan to serve as his new identity, forever linking her memory to the young operative.