The Maenads of Troniac (named after the maenads from Greek mythology) are humans (or other intelligent life-forms) who have been parasitisedby specially engineered virobots.  First deployed during the robot wars of late Era-0 and early Era-1, they were developed by the forces of General Zarlok, and saw their fullest use by the Engine of Negation in their ongoing attempts to rid the galaxy of organic life.

Instead of having their hosts build more virobots, the virobots used to create maenads are designed to drive their hosts into a berserk rage, focused on injuring or killing intelligent life.  Mostly used as a weapon of terror, maenads occasionally played bigger roles in thinning out the populations of cities before a direct attack.  This was generally accomplished by aerial bombardment, using munitions stuffed with virobots that could be scattered in population centers.