A spirited five-year-old girl with a curious nature and a playful imagination, who becomes Stargirl's best friend and helps her connect with their new community. Her honesty and antics bring fun and spontaneity to Stargirl's life.

An aggressive and irritable eleven-year-old girl working at a donut shop, known for her boy-hating attitude and rough edges. Stargirl helps her navigate her anger and transition into adolescence.

An agoraphobic woman who is afraid of the outside world, often staying isolated at home. She offers Stargirl advice on living in the present and becomes a supportive figure in her life.

A charismatic young man with a reputation as a "bad boy," who attracts attention and admiration. He has a complex relationship with Stargirl, filled with both tension and intrigue.

An elderly man who spends his days at the cemetery near his wife's grave, cherishing memories and sharing them with Stargirl. He represents the significance of reflecting on the past while embracing the present.

An enigmatic figure often seen wandering through town in distinctive clothing, who becomes a silent listener for Stargirl. He helps her understand the importance of living in the present.

The lively owner of the local donut shop, known for her experimental donut creations and community presence. She has connections with several characters and provides insights to Stargirl about the town and its residents.

A retired professor and paleontologist who mentored Stargirl in Arizona, offering wise counsel and support. His connection to nature and understanding of the world continue to influence Stargirl.

Stargirl's former boyfriend from Arizona, whose past decisions continue to affect Stargirl emotionally. He remains a significant figure in her reflections and personal growth.

Stargirl's supportive parents, who provide her the freedom to explore her identity while ensuring her well-being. They are integral to her recovery from past experiences and adjustment to new surroundings.