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Kitty Katswell is one of the main characters of T.U.F.F. Puppy, and is T.U.F.F.'s number one agent. She's also an expert in combat, weapons, and detective work. She is Dudley Puppy'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.