Tessa is an eighteen-year-old college student working as an intern at Vance Publishing. She begins the story dealing with the immediate fallout of a cruel bet orchestrated by her boyfriend. This betrayal isolates her from her former friend group and forces her to reevaluate her housing situation. She frequently seeks emotional support from others while struggling to maintain her independence from her strict mother.

Hardin is a heavily tattooed university student from England who originally moved to Washington State to repair ties with his estranged father. He experiences severe nightmares stemming from childhood trauma and relies on Tessa to manage his emotional state. His intense jealousy frequently boils over into physical violence. He regularly manipulates situations to keep Tessa dependent on him.

Zed is a former friend of Hardin who participated in the cruel wager regarding Tessa. He actively pursues Tessa after her breakup by offering her a quiet place to stay and a listening ear. He presents himself as a considerate, emotionally available alternative to Hardin. He observes his rival's mistakes closely to advance his own position.

Landon is Tessa's best friend and Hardin's stepbrother. He acts as a mediator for the couple, offering both of them advice and temporary housing during their frequent fights. His steady, long-distance relationship with his girlfriend Dakota provides a sharp contrast to the surrounding drama. He maintains a calm demeanor even when faced with Hardin's hostility.

Ken is the chancellor of Washington Central University and Hardin's biological father. He is in recovery from a severe alcohol addiction that previously destroyed his family in England. He lives a quiet, successful life with his new wife Karen and stepson Landon. He continually attempts to mend his fractured relationship with Hardin despite facing constant anger and resentment.

Trish is Hardin's mother who resides in London. She survived a violent assault during her marriage to Ken and subsequently raised Hardin on her own. She travels to Washington under the impression that her son is happily dating Tessa. She pushes Hardin to manage his anger and acts as a stabilizing force during her visit.

Tessa's mother is a strict, impeccably dressed woman who orchestrates her daughter's choices. She survived an abusive marriage and copes by maintaining rigid control over her environment. She strongly disapproves of Hardin and actively schemes to reunite Tessa with her hometown ex-boyfriend.

Karen is Ken's new wife and Landon's mother. She maintains a warm, inviting home and actively tries to include Hardin in family activities. She offers Tessa a safe place to stay during difficult times and frequently bakes or cooks for her guests.

Christian Vance is the successful head of Vance Publishing. He recognizes Tessa's strong work ethic and actively promotes her career growth. He uses his wealth and influence to secure VIP treatment for his staff during business trips.

Kimberly is Christian Vance's secretary and romantic partner. She is friendly, outgoing, and takes an immediate liking to Tessa. She encourages Tessa to relax and enjoy the social aspects of their business trips, often pushing her slightly out of her comfort zone.

Trevor is a financial team member at Vance Publishing. He is polite, professionally dressed, and shows a clear interest in Tessa. His presence frequently triggers Hardin's intense jealousy, even when Trevor simply offers Tessa a ride to work.

Noah is Tessa's ex-boyfriend from her hometown. He represents the safe, predictable life Tessa left behind when she moved to college. He offers sympathy regarding her recent breakup but remains closely allied with her controlling mother.

Jace is an acquaintance of Hardin who was involved in keeping the virginity bet a secret. He actively provokes Hardin regarding Tessa's new single status and attempts to manipulate situations to get closer to her himself.

Molly is a girl from Hardin's past who actively pursues him. She dislikes Tessa and frequently attempts to humiliate her in social settings, using aggressive games like Truth or Dare to force uncomfortable confrontations.

Stephanie is Tessa's former roommate. She knew about the virginity bet but chose not to warn Tessa, leading to a permanent fracture in their friendship. She remains integrated in Hardin's social circle and attends fraternity parties.

Tristan is Stephanie's boyfriend and a friend of Hardin's. He participates in the group's drinking games and casually delivers news about other friends' legal troubles.

Smith is Christian Vance's young son. His mother passed away, leaving him anxious about his father's health. He initially refuses to speak to Tessa but bonds surprisingly well with Hardin over television shows.

Mike is Trish Daniels' long-time neighbor in London. He has recently transitioned into being her romantic partner, offering her a stable and healthy relationship after years of hardship.

Natalie is a girl from Hardin's past in England. Hardin previously recorded a sexual encounter with her for a bet, which resulted in her losing her home and scholarship. She has since rebuilt her life and is engaged.

Carly is an old acquaintance of Hardin's. She provides him a place to stay during a bender and drives him back to his car, inadvertently causing friction when Tessa learns they spent time together.