Epsilon 5 was a First Order stormtrooper of male identity who served as a pilot of a TIE/fo space superiority fighter. He took part in an attack on Arthon, an Ottegan world, as one of two starfighter escorts for Kylo Ren's command shuttle. In the midst of the combat, an Ottegan siege engine fired a missile at Ren's shuttle; however, after the command shuttle dodged the projectile, it instead impacted Epsilon 5. As his TIE fighter plummeted to the ground, the Epsilon 5 trooper vocalized his distress via a comm channel, irritating Kylo Ren because it represented the eighth First Order loss in the engagement.