For those of you Harry Potter fans, your probably recognize Mr. Peter Pettigrew as the wizard who betrayed James and Lily Potter leading to their death at the hands of He Who Must Not Be Named. Pettigrew (AKA Wormtail) faked his death and hid for years as Scabbers the pet rat of one of Harry’s friends, Ron. Pettigrew’s true identity came to light as he again tried to help The Dark Lord.
The rat persona was appropriate for Peter as he was a petty man living through the popularity of his friends. Prone to bitterness, he betrayed them and framed another friend to take the blame. Even his master found him contemptible: