A self-assured high school junior known for her weight loss journey and love of dancing, she confronts bullying with confidence and humor.

A popular girl at school and Jack's on-again, off-again girlfriend, known for her beauty and rivalry with Libby.

Jack's 10-year-old brother, characterized by his scrawny build, red-brown Afro, and unshakeable confidence.

Libby's caring and protective single father who shares a strong bond with her after the loss of her mother.

One of Jack's best friends, a popular jock who influences Jack's decisions, especially in social situations.

Libby's earnest and supportive school friend who reconnects with her when Libby returns to Martin Van Buren High.

Libby's school friend who becomes an ally after sharing similar experiences with bullying.

Jack's 16-year-old brother, responsible for eventually taking over the family business.

Jack's father, a cancer survivor, and owner of Masselin’s Toys.

Jack's loving and pragmatic mother, unaware of family secrets until the end.

A student at Martin Van Buren High who gets into conflicts with Jack over relationship misunderstandings.

Coach of the Damsels, the school drill team for which Libby auditions, though she ultimately forms her own dance squad.

The school counselor who leads the Conversation Circle, a safe space for addressing issues like bullying and conflict.

Jack’s chemistry teacher and a key figure in his family dynamics.

A school bully known for his cruel treatment of others, including past and present harassment of Libby.

Libby’s counselor and long-time support figure who shares a close relationship with her.

Part of Jack’s friend group, who encourages Jack in his socially thoughtless behavior.

Caroline’s best friend and partner in bullying tactics, often targeting Libby.