Gretchen is a fellow student in Cal’s study hall who becomes a central figure in the story as she struggles with personal challenges and forms a bond with Cal.

Otto is Gretchen’s father, representing an ominous presence in the narrative with his controlling and religious nature.

Horace is Cal’s father, characterized by his work on the streetcars and a complex yet distant relationship with Cal.

Peggy is Cal’s 12-year-old sister who shares his compassionate traits and plays a crucial role in a pivotal moment.

Lola is Cal’s romantic interest, highlighting the typical challenges and dynamics of teenage relationships.

Helga is Gretchen’s sister, who experiences significant personal struggles and remains in a psychiatric hospital.

Steve is one of Cal’s best friends, navigating personal traumas including past illness and family losses.

Sandy is a close friend of Cal's, marked by her own search for identity due to her adoption.

Lurine is Cal and Peggy’s mother, known for her practical nature and attempts to manage the family's dynamics.

Ruth is Gretchen and Helga’s mother, initially depicted as a silent bystander to family issues.

Uncle Emil is Horace’s brother and serves as a mentor figure for Cal during his childhood, fostering an appreciation for nature.