Jimmy is an adult male with straight brown hair slicked into a middle part, brown eyes, and stubble. His clothing consists of the Pony Express jumpsuit, a white long-sleeved t-shirt underneath, and black sneakers. He has some wrinkles and appears to have a thinner body type. Jimmy is a very complex character, shown to both experience guilt for some of his actions while also being intentionally manipulative and spiteful. It was mentioned that he has struggled with life back on earth.