Millie is a young woman taking psychology classes while working as a housemaid to afford her Bronx apartment. She carries a felony conviction that severely limits her career options, forcing her to hide her past from prospective employers and her current boyfriend. Having a history of helping women escape abusive partners, she is highly observant of relationship dynamics and becomes deeply concerned when she notices troubling signs in her new employers' home.

Wendy is the wife of Coinstock CEO Douglas Garrick. Having grown up poor and attended private school on scholarship, she has a deep desire for financial security and high social standing. She spends most of her time locked in her bedroom, displaying visible facial bruises and showing intense fear of her husband's strict household rules.

Douglas is the wealthy CEO of Coinstock. He presents himself to Millie as a caring husband looking for help with his chronically ill wife, but he enforces strict rules regarding his diet, laundry, and household schedule. He demands that his wife be left completely alone in the guest bedroom, reacting with anger when those boundaries are crossed.

Russell is a handsome, charming furniture salesman who takes great pride in his physical appearance. He uses his smooth demeanor to sell expensive items to wealthy clients, relying heavily on his wife's corporate connections to bring high-end customers into his shop.

Brock is an affluent lawyer who pushes for a fast-paced commitment with his girlfriend, Millie. He has a heart condition that motivates him to settle down quickly. He continually urges Millie to move into his apartment, unaware of the criminal history she is desperately hiding from him.

Enzo is a resourceful man with deep connections that allow him to arrange fake passports and safe passage on short notice. He left the country a year ago to care for his sick mother in Italy, causing his romantic relationship with Millie to end, though he retains a strong protective instinct toward her.

Marybeth works as a secretary for Coinstock CEO Douglas Garrick. She is highly enthusiastic and overly familiar with her employer's family, acting as though she is close friends with them despite the professional boundaries.

Xavier is a persistent tenant in Millie's Bronx apartment building who lives on the floor directly below hers. He constantly inserts himself into her daily routine, ignoring her clear rejections and making her feel entirely unsafe in her own home.

Amber is a wealthy woman who briefly employs Millie. She is quick-tempered and easily jealous, prioritizing her personal appointments over her employee's schedule and reacting poorly when her child bonds with the hired help.

Detective Ramirez is a law enforcement officer assigned to investigate a high-profile death. He methodically builds timelines and questions suspects using text messages, security footage, and physical evidence.

Joe is a lawyer who handles high-level financial arrangements for Coinstock's CEO. He is highly protective of his clients' wealth, drafting strict legal documents to safeguard their assets from potential future divorce settlements.

Scavo is a police officer who responds to a local disturbance involving Millie and her neighbor. He holds a strong bias against individuals with criminal records, immediately assuming the worst about individuals with felony convictions.

Audrey is a well-connected woman in Wendy's social circle. She shares local rumors over lunch, including stories about women escaping abusive marriages and the people who operate in the shadows to help them.

Olive is Amber Degraw's nine-month-old baby. Because her mother is frequently busy with personal appointments, Olive spends a significant amount of time with household employees, leading to confused attachments.