Erk Zallis was a male Ugnaught engineer. He was hired by the Galactic Republic to work at the carbon freezing chamber of the Jedi Temple during the Clone Wars. Around 21 BBY, Zallis operated the carbon freezing device and froze several Jedi and clone troopers. The Republic elite team needed to avoid life form scan by being frozen to infiltrate the Separatist prison known as the Citadel on the planet Lola Sayu.