Anne refers to herself as what type of animal. What does this expression mean?

In the play version, she refers to herself as looking like a cat,

Anne. Good evening, everyone. Forgive me if I don’t stay. (She jumps up on a chair.) I have a friend waiting for me in there. My friend Tom. Tom Cat. Some people say that we look alike. But Tom has the most beautiful whiskers, and I have only a little fuzz. I am hoping . . . in time . . .