Sonny is identified as Sonny Barger, a prominent member of the Hells Angels who plays himself. The Oakland Hells Angels are drawn into Chuck and Wes's plan, create a disturbance outside Caesars Palace, and later pursue the brothers into the desert. The plot summary does not specify Sonny's individual actions within those group events.
Sonny Barger has 11 screen credits in a career dating back to 1967. Signature works include Off The Boulevard, Gonzo: The Life and Work of Dr. Hunter S. Thompson, Hells Angels Forever. Explore the interactive character relationship maps on each title page to trace how their roles connect across franchises.