Interplanetary Ninja Assassin Claptrap

The  is the main antagonist of the fourth DLC, Claptrap's New Robot Revolution.

Background
The Interplanetary Ninja Assassin Claptrap (INAC) is a reprogrammed version of the very first Claptrap that the player encounters in Fyrestone. Upon the completion of the game, the player witnesses the Claptrap's reprogramming (By Hyperion), and it's new self pronounced Interplanetary Ninja Assassin title. The INAC was designed to indirectly kill off the Vault Hunters, by "poisoning, causing anarchy, and spreading nasty rumors about" them. Upon receiving its assignment, the INAC began to notice how Claptraps were enslaved by their programming, and the Humans. The INAC then broke Hyperion's programming, and began to raise a revolutionary army, dubbing it the "Robo-lution." After a fairly successful revolution, the INAC now leads the Claptrap forces in the hunt to exterminate Humans.

Involvement
The INAC is the main boss of the Claptrap's New Robot Revolution downloadable content. While the Vault Hunters are trying to track him down, he brings back three bosses and enhances them with Claptrap parts (Knoxx-Trap, Steele-Trap, Ned-Trap). Upon defeating each of these bosses twice, the Vault Hunters come face to face with the INAC, in the final battle for the borderlands.