Chop'aa Notimo, a Human male, was a Mandalorian mercenary who fought for the Confederacy of Independent Systems during the Clone Wars. After the end of the conflict, he briefly joined the Black Sun criminal organization before striking out on his own. Notimo took over criminal operations in the Bespin system, including the Cloud City mining colony. As an underworld kingpin, he employed a number of henchmen, including his second-in-command, the Gungan bounty hunter Kleef.