MTS-5F "Meatshield" was a prototype of a new droid line built for one purpose- protecting assigned targets and destroying assassin droids. Built by a secret creator whose name even his programming does not show, it came to life during the first years of the empire. Unfortunately, his creator, a human male he simply called "Architect," was found out by Holowan Mechanicals, and they sent an IG-Series Assassin Droid after him. While MTS-5F was able to destroy it's first true adversary, it was unable to protect his creator. As it held The Architect dying in his arms, his programming scrambled itself. Now, MTS-5F is searching for a new target, who it can protect, all the while with a hardwired vengeance and hatred of Assassin Droids and the constant need to better upgrade his body and weaponry to be more and more lethal towards his foes.

(Revenge) MTS-5F's programming wishes to see any Assassin Droid be utterly destroyed. He pursues this whenever he can while also trying to find a new target to guard.

Bounty: 25 MTS-5F has a bounty on his mechanical head for the destruction of IG-Series Droids, with many Assassin Droids and non-mechanical Bounty Hunters going after him. He defeats the Droids when he can, and generally tries to stay hidden while searching for a new master to protect and new weapons to outfit himself with.

MTS-5F is approximately seven feet tall, with dark green, dark brown, and gunmetal durasteel plating. It's bulky form actually hides high agility, and he can take lots of system and physical punishment before breaking down. He has a retractable Ion Blaster in his right arm, and a retractable Vibro-Ax embedded into the left. He holds a DLT-19 Heavy Blaster Rifle as his main armament, which his programming constantly tells him to upgrade with attachments or replace with a heavier weapon.