The Heavy Guardian was a model of large, bipedal droids with three grasping claws on either arm. G0-T0 kept a number of such droids aboard his Droid Yacht to attack intruders. He kept more of the same model on Nar Shaddaa, using them as spies and assassins. Those on Nar Shaddaa went under the guise of cleaning droids, using sonic waves to clean. Identical droids served as maintenance droids in the warehouse of Vogga.