Edder was a Human male soldier who served the Galactic Republic as a private in the Republic Army's 301st Infantry. In 3642 BBY, during the battle on the planet Hoth against the Sith Empire and the White Maw pirates, Private Edder was assigned to Sergeant Fideltin Rusk's new unit after the sergeant's previous squad was lost in combat. Edder served alongside Privates Vanth, Voshpar, Dromol, and Reico as Rusk's squad aided the Hero of Tython and Leeha Narezz in the Jedi's search for the plans to the Sith Emperor's space station.