Lexi is a fourteen-year-old girl who has spent years moving through the foster care system following the death of her mother. She relocates to Port George, Washington, to live with her great-aunt in a mobile home park. Highly aware of her lack of financial resources compared to her wealthy Pine Island classmates, she saves her money from working at a local ice cream shop. She is polite, hardworking, and desperate to prove she belongs in a permanent home.

Jude is a forty-six-year-old mother living on affluent Pine Island. Driven by the emotional abandonment she experienced from her own mother during childhood, she is fiercely overprotective of her twins, Mia and Zach. She volunteers for school events, dictates social schedules, and believes that maintaining strict control over her family's world will keep them safe from harm.

Zach is Jude and Miles's teenage son and Mia's twin brother. He is an athletic and popular student who projects conventional confidence among his peers. However, beneath his polished exterior, he harbors a deep fear of failure and struggles under the pressure to succeed academically and become a doctor like his father.

Mia is Zach's twin sister. Unlike her brother, she is extremely shy, quiet, and lacks self-confidence. She relies heavily on her twin and her mother for emotional support in social situations. Forming a fast friendship with Lexi helps her step out of her comfort zone and begin finding her own voice.

Eva is a sixty-six-year-old widow who lives in a mobile home park on the Port George reservation. She works at Walmart and operates on a tight budget. Despite her limited financial means, she is determined to provide a stable, loving environment for Lexi, famously quitting smoking just to create a better home for the teenager.

Miles is Jude's husband and a successful surgeon. He provides a steady, calming presence in the Farraday household. He frequently attempts to curb Jude's overprotective tendencies, encouraging her to give their children space to grow and make their own decisions.

Caroline is Jude's mother. Following the death of her husband decades ago, she became emotionally distant and withdrew from her daughter entirely, leaving Jude to be raised by nannies. She now runs an art gallery in downtown Seattle and treats her family interactions as formal obligations.

Ms. Watters is a dedicated social worker employed by the state. She accompanies Lexi on the long journey to Port George, ensuring the teenager safely reaches her new guardian after years of bouncing between foster homes.

Molly is a local Pine Island resident and Jude's close confidante. She regularly meets with Jude to offer a listening ear and emotional support regarding the stresses of parenting teenagers.

Tyler is a student at Pine Island High School who runs in the same social circles as Zach. He attends local parties and becomes an early romantic focus for Mia, representing her initial foray into the teenage dating scene.

Amanda is a popular student at the high school. She dates Zach during their early high school years before they eventually part ways, allowing Zach to pursue his feelings for Lexi.

Scot is a local attorney operating an office on Pine Island. He provides legal counsel and guidance to residents facing the justice system, offering practical advice based on local court dynamics.

Dr. Bloom is a professional psychiatrist working in Seattle. She maintains a serious, unsmiling demeanor during her sessions, focusing on concrete medical treatment and routine over false optimism.