Dunn was a male Human Ensign of the Sith Empire living during the Galactic War. He served in the Imperial Navy aboard the Harrower-class dreadnought Tyrant. When the Grand Champion of the Great Hunt arrived at the Tyrant to meet with Darth Tormen, Dunn and Parson attempted to confiscate the bounty hunter's weapons, but the hunter refused and Dunn was killed in the conflict.