From Halopedia, the Halo wiki
Dass was a middle aged, married, and slightly overweight Colonial Militia recruit. He was described as patient but forceful, due to the fact that he had children; one boy, two girls. He noted as being a little overweight, but due to his height, the weight was not as noticeable.
Battle of Harvest
Before signing up as a recruit, Dass was a MagLev train engineer. He was assigned as First Platoon's One-Alpha Squad leader, during the First Battle of Harvest near Gladsheim. He helped the stressed Osmo charge his rifle. Dass proved himself to be a good leader, and gave advice to the other recruits during a training session or battle, although he was eliminated in the session from a simulation grenade. During the attempted peace negotiations with the Covenant, Avery Johnson handed his rifle to Dass to show the aliens that he did not wish to fight.
Later on during the battle, he boarded the Tiara with the other volunteers. On the station, an Unggoy named Guff wounded him with a bolt from a Plasma Pistol. When the Unggoy tried to kill Dass with a finishing shot, Staff Sergeant Avery Johnson rescued him from death and killed Guff. Dass was then entered to the container and successfully fled Harvest.
List of appearances