Hannah is a highly competent Executive Protection Agent working for Glenn Schultz's agency in Houston, Texas. Often underestimated due to her five-foot-five stature and ordinary appearance, she holds a second-degree black belt in jujitsu and uses her unassuming looks to blend in as a nanny or assistant. She struggles with feelings of being unlovable stemming from childhood trauma and uses her demanding job to avoid processing her personal grief. Her life is upended when she is forced to take a local assignment pretending to be a famous movie star's girlfriend.

Jack is a famous, conventionally attractive movie star recognized as a two-time "Sexiest Man Alive." Currently visiting his family's Texas ranch to support his mother through her cancer treatments, he desperately wants to avoid worrying her with the reality of his stalker threats. He devises a plan for his new bodyguard to pose as his girlfriend. He suffers from severe survivor's guilt and experiences deep tension within his family following a tragic car accident that killed his younger brother.

Connie is Jack's mother and a retired school principal living on a picturesque Texas cattle ranch. She is undergoing treatment for breast cancer, which serves as the catalyst for Jack's return home. She is a warm and maternal figure who actively tries to use her illness to mend the deep rift between her surviving sons.

Doc is Jack's father, a retired veterinarian who lives on the family's cattle ranch with his wife. He is a steady, observant presence in the household who enjoys shooting bottles and brewing moonshine. He supports his wife through her cancer treatments and watches the tense dynamics between his sons with quiet concern.

Hank is Jack's oldest brother and the manager of the family's Texas cattle ranch. Described as a less polished version of Jack, Hank is rigid and deeply resentful of his brother's presence. He blames Jack for the tragic car accident that killed their youngest brother, Drew, and makes it his mission to drive Jack and Hannah away from the property.

Robby is an Executive Protection Agent at the same agency as Hannah and her immediate ex-boyfriend. He is highly competitive, currently vying against Hannah for a prestigious promotion to head a new London branch. He struggles to take responsibility for his romantic choices, frequently painting himself as the victim while criticizing Hannah's dedication to her work.

Taylor is an Executive Protection Agent, Hannah's next-door neighbor, and her former best friend. After comforting Hannah through a recent breakup, Taylor immediately begins dating Hannah's ex-boyfriend during a work trip. She attempts to justify her actions by claiming she and Hannah were only ever work friends, causing a deep rift between them.

Glenn is the boss of the Executive Protection Agency where Hannah, Robby, and Taylor work. He is a pragmatic manager who prioritizes the agency's success and client satisfaction above all else. He uses the prospect of a prestigious London promotion to leverage his employees, frequently pushing Hannah into uncomfortable professional situations.

Drew is Jack and Hank's deceased younger brother. He died in a tragic car accident several years prior to the events of the novel, an event that deeply fractured the Stapleton family. His memory heavily influences the actions and emotional struggles of his surviving brothers.

Kennedy Monroe is a famous, conventionally beautiful Hollywood actress frequently linked to Jack Stapleton in the press. She represents the superficial, image-obsessed nature of the entertainment industry that Jack desperately wants to avoid, and she uses her beauty and status to intimidate those she views as ordinary.

Wilbur is an online stalker who targets Jack Stapleton with threatening messages. The security team initially dismisses him as a low-level threat, but his actions escalate security concerns for Jack and his protective detail as the assignment progresses.

Hannah's mother is a recently deceased woman whose complicated life deeply affected her daughter. Following the departure of her husband, she struggled with alcoholism and dated abusive men, creating an unsafe childhood environment for Hannah. Her death at the start of the story leaves Hannah with unresolved grief and a lingering sense of being unlovable.

Clipper is an old circus horse residing on the Stapleton family ranch. Trained to do rodeo tricks, the horse provides a moment of levity and connection, allowing Jack to gently encourage Hannah to try horseback riding for the first time since her childhood.