Garf is a boy at summer camp who initially keeps Ralph as a pet and faces challenges with acceptance by his peers. His personal struggles and actions often parallel Ralph's own journey for autonomy and growth.

Chum is a pet hamster with tan and white fur who prefers the comfort of his cage life and acts as a foil to Ralph's adventurous spirit. He provides a philosophical contrast to Ralph with his more cynical outlook.

Aunt Jill is a head counselor at the camp characterized by her empathy and understanding, particularly towards Garf. She supports Garf in his struggles and acts as a positive adult influence by focusing on the natural world around her.

Karen is a camper who owns the watch involved in a camp incident and is distinctive for her fairness and consideration. She represents an alternative to quick judgment among her peers at camp.

Lana is the affectionate owner of the hamster Chum and is known for her kindness toward all animals, including Ralph. Her empathy extends to creatures others might overlook or dislike, showing a compassionate nature.