The Human Evram Lajaie served as a commander in the Alliance to Restore the Republic. In 0 BBY, he was present in the Great Temple, the Alliance's base on the moon Yavin 4. That year, the base's commander, General Jan Dodonna, received the secret plans for the Galactic Empire's superweapon, the first Death Star battlestation. Dodonna, along with Lajaie and others, frantically searched for possibilities to destroy the station, and Lajaie's expertise in space defense and orbital battlestations enabled him to quickly analyze the Death Star plans. After careful analysis, Lajaie discovered a fatal flaw in the Death Star's design—a weakness in its thermal exhaust port vulnerable to proton torpedo assault.
Lajaie was present at the ceremony of awarding the Medal of Bravery to the Heroes of Yavin.
Lajaie was present in a briefing where Dodonna both discussed the findings and arranged for the base's starfighter squadrons to launch an attack on the Death Star. During the battle that followed, Lajaie was present alongside Dodonna in the base's command center monitoring the space battle. Eventually, the battle was won when Rebel pilot Luke Skywalker destroyed the Death Star by firing proton torpedoes into the thermal exhaust port, causing a chain reaction that destroyed the whole Death Star. Following the battle, Lajaie was present in a ceremony when the Medal of Bravery was awarded to Skywalker, Han Solo, and Chewbacca.
Lajaie wore the same uniform as the other officers present in the Great Temple.
Evram Lajaie first appeared as an uncredited Rebel extra in the Yavin 4 scenes of the 1977 film Star Wars: Episode IV A New Hope, including the ending ceremony honoring the Heroes of Yavin. In 1993, The Farlander Papers, a booklet accompanying the video game Star Wars: X-Wing released simultaneously, included an in-universe edited image taken from the A New Hope film scenes of Dodonna's briefing prior to the Battle of Yavin. With Lajaie's extra being included in that image, the photo is a briefing on the MC80 Home One type Star Cruiser Independence prior to an Alliance mission to the Turkana system. However, it is not confirmed if Lajaie is the character in that edited photo in-universe. The character was first identified by name, and given a brief back-story, in the 1996 A New Hope Limited expansion set of the Star Wars Customizable Card Game.