AG-37 was an IG-series assassin droid in operation in the aftermath of the Second Imperial Civil War. A regular visitor to Ania Solo's junkyard on Carreras Minor's moon, AG-37 was in operation long before and had seen empires rise and fall. He had developed a sense of individuality and goals, making a living transporting goods in his freighter. Unlike most other assassin droids, AG-37 was extremely personable and kind, helping others and dispensing advice and encouragement. At some point prior to 25 ABY, AG-37 encountered Han Solo and Chewbacca and made an unspecified promise to Solo. Near the end of the Second Imperial Civil War, AG-37 encountered Ania, a distant descendant of Han Solo, who had escaped from an Imperial prison camp on the planet Drash-So. Seeking to honor his promise to Ha