AR-G0, a class three droid, belonged to Beryl Thorne, a smuggler who conducted her business from Taris in the era of the Cold War. Following the deaths of numerous contacts due to rakghouls, Thorne designated AR-G0 as her second-in-command for her Taris-based operations.
AR-G0 became separated from Thorne during their escape from Nar Shaddaa, amidst the outbreak of internal conflicts within the Hutt Cartel.