A notorious French art thief known for stealing over 300 artworks without violence, motivated by his passion for art rather than profit, as depicted through his interviews with Finkel.

Breitwieser's girlfriend and accomplice, serving as a lookout during his heists and sharing his love for art, though the extent of her voluntary involvement remains unclear.

Breitwieser's mother, whose indulgent parenting and role as his enabler contribute to his lifestyle and art theft activities.

Breitwieser's father, whose departure from the family home and removal of art pieces influence Stéphane's motivations for his crimes.

A Swiss police inspector specializing in art crime, who tirelessly pursues Breitwieser and appreciates art legally, forming a critical part of the investigations.

An inspector in the French art theft division, focusing on Breitwieser's thefts in France with a no-nonsense attitude towards art crime.

The framer Breitwieser employs, who unwittingly frames stolen works and forms a friendship with him based on their shared passion for art.

Breitwieser's second girlfriend post-prison, resembling Anne-Catherine, but who eventually reports him to the police when he engages in further criminal acts.