This is a Red Guardian in my Necreshaw comic. They may not look as menacing as some of the other drones, but they are actually some of the worst to deal with. They're very mechanical in their attacks. I know it's not evident in this pick, but in the book I reveal the fact that these sentries possess no legs. They have sort of a spider walk going on beneath the skirt. When they move, it's sort of a gliding motion.