Hewex was a male human who served as a Major in the Galactic Empire during the Galactic Civil War against the Alliance to Restore the Republic. During the war he was stationed on the moon of Endor in a bunker housing a shield generator which provided protection for the Death Star II battlestation being built in Endor's orbit. The Major, alongside Commander Igar, supported the station's commander, Colonel Dyer. During the Battle of Endor, in which the Alliance attacked the incomplete Death Star, a team of Rebels was sent to the moon's surface in order to destroy the shield generator bunker. The Rebel General Han Solo successfully tricked Hewex into sending several squads of Imperial troopers stationed in the bunker out to aid in the fighting, allowing a group of Rebels to enter the bunker.