Lydia is the middle Carroll daughter who runs a small business and is a recovering addict. She has built a life for her and her daughter Dee after overcoming a difficult past marked by Julia's disappearance and her own personal struggles.

Paul is Claire's husband, an architect with a controlling nature. He is depicted as rich, arrogant, and demanding, with a mysterious past that unfolds throughout the novel.

Julia is the eldest Carroll daughter, known for her strong opinions on feminism and journalism, who was abducted at 19 and presumed dead. Her character influences the narrative posthumously through letters and revelations.

Sam is the father of the Carroll family, who becomes emotionally distant after Julia's disappearance. His perspective is shared through letters addressed to Julia, showcasing his persistent grief.

Helen is the mother of the Carroll family, a retired librarian who remarries after emotionally withdrawing from her family due to Julia's disappearance. She shows a desire to reconnect with her daughters and make amends for past mistakes.

Dee is Lydia’s daughter and the youngest member of the Carroll family. She is studious and aspires to become a veterinarian, representing hope for the family’s future.

Rick is Lydia's boyfriend, a mechanic who provides stability and support for Lydia and Dee. He met Lydia in rehab and acts as a caring father figure to Dee.

Fred is the FBI agent involved in the investigation, characterized by his fancier trench coat and intense demeanor. His behavior and mysterious injury make him a questionable character.

Jacob is the head of the Dunwoody Police, recognized by his unkempt appearance and slow response to action. His conduct often hinders communication with the public.

Huckabee, nicknamed Huckleberry, is the sheriff involved in Julia’s original investigation. He is noted for his bumbling incompetence and traditional sheriff attire.

Johnny is a congressman and Paul’s uncle with a powerful influence in law enforcement. His connections enable questionable administrative actions.

Adam is Paul’s childhood friend and business partner, with a habit of being overly in touch with his emotions. He shares a complicated history with Claire.

Anna is a 16-year-old girl who recently went missing, seen as the 'perfect' victim. Her case is part of the larger narrative involving dangerous investigations.