Theron Guards are elite members of the Locust army. They're smarter, nastier and stronger than standard Drones and they often wield a Torque Bow, sometimes a Cleaver. They utilize cover effectively and work together to suppress and flank nearby Gears. On top of being much more cunning on the battlefield and possessing a weapon that can blow a Coalition of Ordered Governments to pieces from far away, Theron Guards are quite resilient against damage.
Other variations: Palace Guard, Theron Elite, Theron Sentinel and Savage Theron.