Rat Phil Sr.
Phil Sr. is a rat who lives on the streets of New York City with his best friend, Mike... until he unknowingly ingests rat poison and dies. He is then replaced by his son: Phil Junior.
- Adaptational Nice Guy: Phil Sr is really a nice guy... but is annoyed by a friend named Fink because he is loud and boasts about his sexual conquests and the many babies that he has fathered in a single day.
- Best Friend: Phil Sr and Mike are shown to be best friends. Mike is more outgoing and confident than Phil Sr, who is more shy and less confident than his best friend.
- Characterization Marches On: Becomes more confident after taking a pill.
- Cool Kid-and-Loser Friendship: Phil Sr is shown to not be as popular amongst the other rats compared to Mike, who is more popular and successful with female rats.
