CT-782 was a clone trooper who served in the Grand Army of the Republic during the Clone Wars. CT-782 earned the nickname of "Hevy," due to being a heavy weapons expert. In 22 BBY, Hevy, along with his fellow Domino Squad clone cadet troopers, trained within Tipoca City's military complex under the Siniteen bounty hunterBric. As Hevy and the squad took practice excises to prepare for theirfinal test to become battle-ready clone troopers, the team struggled to work together as a team. Because of this, Hevy and the squad later failed their test, forcing Hevy to consider leaving the team. However, after Jedi Master Shaak Ti allowed Hevy and his team to retake the test, the squad was able to put aside their differences and passed the test successfully, allowing Hevy and the squad to become clone troopers. Following the success, Hevy was given his first off-world assignment—patrol the Rishi Station, a listening post located on the moon ofRishi. Under the command of Sergeant O'Niner, Hevy and the group of rookiee troopers maintained the listening post to warn the Galactic Republic fleet of any Confederate attacks in the Outer Rim. Hevy was present during a surprise Confederate attack on the station. BX-series droid commandos took over the Rishi moon base and fortified themselves inside. After Commander Cody and Captain Rex soon arrived at the base for a routine inspection, the clone officers met up with Hevy and the remaining clone troops and organized a plan to attack the droids. Once the clones retook the base, Rex ordered the destruction of the listening post. When the detonator for the explosive liquid tibanna failed to work, Hevy offered to stay behind and fix the problem. When droids entered the base and attacked Hevy, the clone opted to manually detonate the explosives, instantly killing himself and destroying the droids and the listening post.