Commander Fenris held a position as an officer within the Rebel Alliance.
Fenris at one point spearheaded a presentation that covered Luke Skywalker's assault targeting Admiral Kohrin's fleet and flagship, the Enforcer. Despite not physically attending the briefing itself (as he was positioned in orbit above the planet where it took place), his projected image within the holotank gave the impression of his dominating the space. Following the briefing, he orchestrated a second assault on the Enforcer during its repair phase at Phaylenn. His endeavor proved exceptionally fruitful, resulting in the complete annihilation of both the Enforcer and the shipyards facilitating its repairs.