Astrid’s new friend from the roller derby team, known for her vibrant energy and love for Broadway, who helps Astrid establish her new identity by encouraging her to dye her hair and join the sport.

Astrid's best friend since first grade, who shares an interest in ballet, leading to their drifting apart as she pursues new friendships and activities away from roller derby.

A university librarian who supports her daughter’s growth and passion for roller derby despite tight finances, exemplifying a nurturing and culturally enriching influence on Astrid’s life.

The dedicated roller derby coach who pushes Astrid and her team to develop their skills while providing guidance and support, playing a significant role in Astrid’s transformation.

A star jammer for the Rose City Rollers and Astrid’s role model, whose confidence and resilience inspire Astrid to pursue roller derby and develop her own strength and courage.

The antagonist of the story, known for bullying Astrid from a young age, who symbolically represents the challenges Astrid must overcome as she navigates her own personal growth.