Booster X10 is one of many small Transformers who were once normal machines brought to life by the power of the AllSpark. Booster X10 loves to mess with his user's head, and he does that through messing with their ears. Sound manipulation is his specialty, and not only can he record and playback sound, but alter still-in-the-air soundwaves. He laughs to himself, knowing how much trouble and strife he can cause with a warped word in conversation, or changing something like an ambulance siren into a barking dog.