Garfielf looks like Garfield (which is also what it is based on) but is really a man in costume. Whenever you encounter him he will always shout that he hates Mondays. He is a rare character, and if he's in your party on a Monday, he will teleport you to a small section of forest filled with skeletons and a siege with an overwhelming amount of zombies at late night will begin and last for 2 hours.
Tip: Don't ever get this guy in your team unless you are desperate for a party members.