Travis’s grandfather and guardian, who struggles with alcoholism and the responsibility of raising Travis after losing his own son. He undergoes a personal transformation, striving to be a better parental figure for Travis.

The dog that was an important part of Travis’s life and family, reflecting Travis's emotional struggles and the grief he carries. Rosco's memory plays a significant role throughout Travis’s journey.

An eighth grader at Travis’s new school known for her quirky and outgoing nature, who becomes Travis's closest friend. She faces her own challenges with family neglect and the loss of a father figure.

Velveeta’s mother and brother; her mother is neglectful and struggles with alcohol, while Jimmy is an irresponsible adult sibling. Velveeta's relationship with them is fraught with tension and disconnect.

Velveeta’s deceased neighbor, best friend, and father figure who played a significant role in her upbringing. His influence persists through Velveeta’s letters and memories, guiding her growth.

A reading teacher who supports and encourages Travis with his eccentric teaching methods. His belief in Travis’s potential helps Travis grow both academically and personally.

An intelligent classmate of Travis and Velveeta, often bullied for his "nerdy" traits, who becomes their friend. Bradley’s supportive friendship helps the trio navigate their challenges together.

The local librarian who becomes a mentor to Velveeta and steps in as a supportive, nurturing figure after Calvin's passing. Connie provides Velveeta with guidance, work, and a safe refuge.