Harry is a recurring antagonist of the Garfield franchise.
Harry loves to eat birds, and on two occasions Garfield had to save some bluebirds from being eaten by Harry. He has also been able to get jobs on occasion (e.g. working at Eddie Gourmand's Cheese Land).
Whilst Harry is usually portrayed as an alley cat, in the episode "Home for the Holidays", when he says that he wants to have some of the food, Arlene tells him that they will have food when they get home, implying that he lives with Arlene.
He is a stray alley cat with black fur and two different colored eyes, one green and one orange.