A GrayCris-fielded Combat SecUnit able to counter-hack Murderbot, who wants only to kill it.
The Combat SecUnit is the deadliest of the three Palisade units GrayCris deploys to the TranRollinHyfa port to stop Murderbot. Designated 'Hostile One,' it distinguishes itself from ordinary units by hanging back to study Murderbot's tactics rather than charging, and—unlike governor-bound SecUnits—it can detect and counter-hack Murderbot's systems, seizing control of its 'Deploy&Delay' bot-swarm code and shrugging off hits to its shoulders and lower back that would drop a normal unit. Recognizing it as a Combat SecUnit is Murderbot's 'oh shit I'm going to die' moment.
It sends Murderbot a curt 'Surrender,' expecting an amateur malware attempt; instead Murderbot offers to hack its governor module and set it free, with IDs and currency to escape. Its only answer is 'I want to kill you'—not from knowledge of Murderbot, simply its purpose. It nearly runs Murderbot down, and lunges through a closing barrier as Murderbot escapes, arms shoved into the gap before the barrier slams shut between them.
An armored Combat SecUnit in proprietary Palisade armor with a helmet, faster and more resilient than a standard unit, backed by a tight cloud of drones.
Primary combat antagonist; the Combat SecUnit hunting Murderbot for GrayCris.