Longarm is a fictional character from Transformers: Animated. He appears as a seemingly mild-mannered, helpful Autobot engineer and police liaison, but he is actually an undercover Decepticon spy named Shockwave. His role in the series is to infiltrate Autobot operations, gather intelligence, and manipulate events from within. Longarm’s double identity makes him one of the show’s key hidden antagonists, and his eventual reveal as Shockwave is a major twist that changes how other characters view him.