First appears in: The Stone Flame
The Sentinels are the heavy gunners of the Remnant city of Gulthurub who man the "powerful Gatling guns" positioned atop the city's cinder block guard towers. Tasked with defending the barricades against elven incursions, these Sentinels are described as "big men" with "muscular, tanned arms" who must follow strict firing orders from Segena and the Warlord.