Son of General Martok who had a reputation for being an exceedingly belligerent warrior, even for a Klingon. Drex was part of the massive Klingon invasion force at Deep Space 9 on Stardate 49011. During their visit to the station, Drex and four other Klingons attacked Garak in his tailor shop, breaking seven of his transverse ribs and fracturing his clavicle.