Dallas is a 21-year-old from the conservative town of Chapel Falls, Georgia. Initially engaged to Madison Licht through an arrangement made by her father, her life changes when she is thrust into an unexpected marriage with Romeo Costa. She is an avid reader who drops out of Emory University and brings only a suitcase of books to her new home. Carrying the grief of losing her infant sister to SIDS, she dreams of starting a family of her own. Despite her sheltered upbringing, she exhibits a strong-willed nature and refuses to submit quietly to her new husband's controlling rules.

Romeo is the 31-year-old Chief Financial Officer of Costa Industries, an arms dealing company based in Maryland. He resents his family and desires the CEO position. He uses his wealth to manipulate situations to his advantage. Highly disciplined and emotionally guarded, he views his abrupt marriage to Dallas as a strategic tool for his business ambitions.

Madison is a wealthy bachelor whose family owns Licht Holdings. He operates as an established rival to Romeo Costa and represents the affluent world Dallas grew up in. Unlike Dallas, who longs for a family, Madison shows little interest in domestic life, maintaining a history of prioritizing corporate dominance and personal conquests.

Known primarily as Senior, he is the withholding head of Costa Industries. He leverages the family business to control his son, refusing to promote Romeo to Chief Executive Officer until he meets rigid demands, including finding a wife. Senior is self-serving, demanding, and displays a history of overstepping boundaries with the women in his son's life.

Shepherd is Dallas's father and a prominent figure in the conservative community of Chapel Falls. He prioritizes his family's social standing and beneficial business alliances over his daughters' personal choices. He initially arranges Dallas's marriage to Madison Licht before abruptly handing her over to Romeo to avoid a public scandal at a debutante ball.

Morgan is a former au pair who became engaged to Romeo during his early twenties. Her past relationship with him casts a long shadow over his current behavior and his outlook on romance. She serves as a persistent memory of heartbreak that informs Romeo's deeply cynical approach to love and trust.

Hettie is Romeo's private chef. She took the position straight out of Le Cordon Bleu for the high salary and free rent. She finds her culinary creativity stifled by Romeo's bland, rigid dietary preferences. She eagerly welcomes Dallas's adventurous palate. She provides the isolated young woman with warm meals and much-needed companionship in the massive Potomac estate.

Frankie is Dallas's younger sister, known as the loud, energetic member of the Townsend household. She shares a close bond with Dallas and worries about her sudden relocation to Potomac. She tries to intervene physically when Romeo comes to collect Dallas. She demonstrates a protective streak despite her youth and lack of power.

Oliver is one of Romeo's closest friends. He is a wealthy bachelor who frequently travels with Romeo and Zach. He provides a sounding board for Romeo's plans and frequently teases him about his possessive behavior regarding Dallas. He points out emotions Romeo refuses to acknowledge.

Zach is a part of Romeo's tight-knit circle of wealthy friends. He frequently hosts the group at his home and participates in their ongoing text threads about business and relationships. He offers blunt commentary on Romeo's sudden marriage and monitors the couple's activities from afar.

Vernon is the groundskeeper and housekeeper at Romeo's sprawling Potomac estate. He is one of the few staff members Dallas interacts with during her initial confinement. He presents Dallas with a Venus et Fleur rose, offering a rare gesture of welcome in her hostile new environment.

Cara is Romeo's highly efficient secretary. She handles the practical logistics of his demanding life. She easily guesses Dallas's clothing sizes when ordered to build her a new wardrobe, and she processes Romeo's volatile moods with professional detachment.

Natasha is Dallas's mother, residing in Chapel Falls. She exists within the conservative framework of her husband's household. She keeps in contact with Dallas after her sudden departure and worries about her well-being from afar.

Monica is Romeo's mother and the wife of Senior. She maintains the appearance of a wealthy matriarch but shares a strained and distant relationship with her son. This distance stems from a history of emotional neglect during his childhood.

Bruce is the Chief Operating Officer of Costa Industries. He has held the position since before Romeo was born. This creates a source of professional friction, as Romeo believes he rightfully deserves the title.

Jared is Romeo's personal chauffeur. He handles the transportation for the Costa household. He drives the tense couple from the airport to the Potomac estate and facilitates Romeo's movements around Washington, DC.