Zeb-Zione,also called "ZZ" or "Uzi" was an Advanced Recon Commando (ARC) during the Clone Wars but was later getting the rank of a Senior Stormtrooper Commander (SSC) during the Imperial Era. Zeb-Zione got the name after his teacher in Maths that died from an explosion, his name was Sebastian Zione. ZZ was completely trained clone and survived the Order 66 because of a tumour that is very rare when it comes to clones. He was on surgery during the Knightfall and that's why he didn't get the order. ZZ then joined the resistance squad named The Broken Source.