Born on Mirial in 29 BBY and later cloned by the Kaminoans in the year 49 ABY following her fall to the dark side, Unduli was one of the seven surviving Null-class Advanced Recon Commandos, who were trained by Sergeant Darman Skirata, himself a former Republic commando. She formed a lasting friendship with RC-3323, a defective clone of Jedi Padawan Shria Marek who had somehow been missed by Kaminoan quality control. She trained under the nickname "Chance," much as she had during her first visit to Kamino prior to the Clone Wars. At one point, the Null squad, who by that point included former ARC trooper N-13, fell under the temporary command of ARC Commander Echo.