Jecht Eris was a member of the Imperial forces, holding the rank of Officer, during the era of the Galactic Civil War. After the Battle of Yavin, Eris, who was a Lieutenant, served as a security officer at the Imperial Research and Prison Facility located on Dathomir. At this facility, Imperial scientists were secretly working on hazardous scientific projects, with the goal of transforming the terrifying Blackwing virus into a bioweapon. In the year 1 ABY, Lieutenant Jecht Eris was on site when an incident occurred at the Imperial Research and Prison Facility, leading to the escape of the virus from its containment. This resulted in the deaths of the majority of individuals in the area, who were then transformed into undead beings.
The character Jecht Eris was referenced in the 2003 video game Star Wars Galaxies. This massively multiplayer online roleplaying game was created by Sony Online Entertainment and distributed by LucasArts. The game was shut down on December 15, 2011. The mention of Jecht Eris was incorporated into the game via "Game Update 14," which was launched on October 12, 2009.