Edder was a male soldier of the Human species. He held the rank of private and fought for the Galactic Republic within the Republic Army's 301st Infantry. The year 3642 BBY saw Private Edder participating in the battle that took place on the planet Hoth. The Republic forces were engaged against the Sith Empire and the White Maw pirate group. Following the loss of Sergeant Fideltin Rusk's original team in battle, Edder joined Rusk's newly formed unit. As part of Rusk's squad, Edder, along with Privates Vanth, Voshpar, Dromol, and Reico, assisted the Hero of Tython and Leeha Narezz in the Jedi's quest to find the schematics for the Sith Emperor's space station.