Killdroids represented a specific type of sentry droid deployed by the Nihil marauder group. These sentry droids stood at a height exceeding two meters, and they were covered in matte-black armor. The faceplates of these droids were completely smooth, except for the shining blue-white symbol of the Nihil, which was made up of three lightning bolts. These droid sentries had spiked limbs and bodies, and their hands were constructed from strong alloys capable of pulverizing bone and flesh. Consequently, the droids did not require any additional weapons. These droids were included in the security measures established by Asgar Ro when he restructured the marauder group, taking on the title of Eye of the Nihil. After his death, his son, Marchion, received the droids, along with the other security measures Ro had put in place. Two of these droid sentries were stationed to protect a small building on the platform that housed the Great Hall of the Nihil, which contained the entry airlock and docking systems, as well as a small group of private chambers. Following the Great Hyperspace Disaster, when Marchion Ro convened with the Nihil's three Tempest Runners, they passed by the droid sentries to get to the complex, and the droids bowed as they went by.