- He is referred to as "Mr. Monroe" by Harold, Howie, and Chester.
- Chester was given to him as a birthday gift, when Chester was a kitten.
- Mr.Monroe is first to discover Bunnicula's eating habits, finding a white tomato in the refrigerator. He does not bond with the pets like kids do, but he's on Chester's good side.
- He's an English professor at a university.
- He likes sourballs.