Gargun was a Human male commander who served in the reconstituted Sith Empire's military during the Cold War.
Gargun led a team into the Dark Temple but failed to return, leaving his subordinate Captain Medle unable to prove his superior's death and thereby take his post. Medle therefore hired a bounty hunter during the galactic competition known as the Great Hunt to enter the Dark Temple and recover the commander's insignia, encountering Gargun who had been possessed by the ghost of Barel-Slathborn. However, the bounty hunter killed Medle when he turned on the mercenary in an attempt to cover up his actions.