A fellow patient at the addiction clinic, Lilly is portrayed as a physically fragile and emotionally open young woman, who forms a deep, meaningful bond with Frey, influencing his journey towards sobriety.

A powerful and authoritative mob boss with a weathered appearance, Leonard becomes a mentor and father figure to Frey, offering guidance and grounding during his recovery process.

James Frey's emotionally invested parents, who, despite being from a prosperous background, struggle with their son’s addiction but remain supportive, providing a backdrop of familial love and hope for his recovery.

The diverse group of staff members at the clinic includes strict figures like Ken and Lincoln, who represent more rigid institutional authority, alongside more compassionate individuals like Joanne and Hank, who offer understanding and support to Frey.