Double (Mega Man X)

Double is one of the villains from the Megaman X series.

Story
Double was a spy who worked for Sigma. During the Repliforce Incident, Sigma sends him to spy on X's actions. Double disguises himself as a chubby, clumsy worker robot, which easily grants him the trust of X and the other Maverick Hunters. Double then works as X's navigator, always reporting to Sigma on X's progress. Once X departs for the Repliforce's Final Weapon, Sigma informs Double that his mission is over and that he can terminate the Hunters. So he destroys the Maverick Hunters who mocked him and goes after X to finish him by himself. At the Final Weapon, he faces X and challenges him. Although X was confused by Double's betrayal, he fights and defeats Double, who mocks X for being so naive to trust him, exploding shortly after.