Jerome usually accompanies Headlock throughout his multiple misadventures trying to get Boom Carts. Though he doesn't really say or contribute much, other than being Headlock's hype man, Etra once mentioned that he was "the muscle" of Headlock's schemes. Both Jerome and Headlock plan on betraying Zorch to rule the galaxy themselves.
Jerome is more defined by loyalty than anything, particularly to Headlock. He mostly serves to assist Headlock during one of his insane schemes. Granted, he is a little more cautious than Headlock when it comes to dealing with Zorch, though his side of the story is often ignored.
Jerome resembles a pink, space lizard, excluding a tail. His eyes are a bright red. He dresses like a traditional general, wearing a black cape, green vest, green pants, black boots, and a black hat.