Kitty Katswell is the deuteragonist of T.U.F.F. Puppy. She is T.U.F.F.'s #1 agent. Kitty is also an expert in combat, weapons, and detective work. She is Dudley's partner, assigned to train him as a T.U.F.F. agent, but often finds herself and her skills foiled by Dudley's antics.