Killer is a classic bad guy's sidekick. His extreme submission and wimpy personality make him perfect for his rank in Carface's gang. In many ways, Killer and Itchy share a few similarities because they're both sidekicks, they're both a bit stubborn in some situations, and most of the time, their opinions are ignored. Killer has it much worse than Itchy though, being that he works for a cold-blooded murderer who won't hesitate to execute him if he's accused of messing up. Deep down, Killer's a good dog. He just puts up a tough, mean front in order to save his skin from Carface's wrath.