Joshua is a 12-year-old, six-foot-tall junior high student and star forward for the Wildcats basketball team. He goes by the nickname "Filthy McNasty" and takes great pride in his trademark dreadlocks, which he feels connect him to his father's basketball legacy. He is confident, academically driven, and deeply bonded with his twin brother. Shifting family dynamics eventually test his emotional maturity and self-image.

Jordan, who prefers the nickname "JB" in honor of Michael Jordan, is Joshua's twin brother and the shooting guard for the Wildcats. He is an inch shorter than his brother and shaves his head completely. Highly social and emotionally expressive, Jordan balances his love for basketball with a developing interest in dating. His new romance leads him to spend more time away from his immediate family.

Chuck, known as "Da Man," is a 39-year-old retired European league basketball champion. After patella tendonitis ended his playing career early, he became a dedicated stay-at-home father who trains his twin sons in basketball and life. He struggles with hypertension and harbors a deep distrust of doctors stemming from his own father's early passing. He often prioritizes an image of invincibility over seeking medical help.

Dr. Crystal Stanley-Bell is the assistant principal at her sons' junior high school and the strict but loving matriarch of the Bell family. She prioritizes education, requiring her sons to maintain good grades and read daily. Increasingly worried about her husband's family history of heart disease, she actively tries to manage his diet and urges him to seek medical attention.

Alexis is a new student at the twins' junior high school who quickly earns the nickname "Miss Sweet Tea." She plays basketball, drinks sweet tea, and has an older sister who attends Duke University. Empathetic and socially adept, she smoothly integrates herself into Jordan's life and creates an unintentional distance between the twin brothers.

Vondie is a core teammate on the Wildcats basketball team and a close friend to both Joshua and Jordan. He shares their love for the game and participates in their social dynamics at school. Dependable and perceptive, he provides a steady presence for the twins during practice and outside of school.

The coach of the Wildcats basketball team runs a disciplined but supportive program for his players. He recognizes the talent in the Bell twins but refuses to let them coast on their abilities. He enforces strict consequences for poor behavior and draws from his own personal regrets to offer the boys guidance about family and loyalty.