Marquez is a retired Harmonium guard who hangs out in the Traitor's Gate Tavern. After talking with Tainted Barse, who tells TNO that his daughter, Jasilya, has been kidnapped by slavers, he will refer TNO to Marquez for more information regarding this quest, Rescue Barse's Daughter. When completed, return and tell Tainted Barse, then tell Marquez. He will give you the first part of the Key to find the deva. He will also train TNO as a fighter if desired.