Kitty Katswell is T.U.F.F.'s number one agent and the deuteragonist of the Nickelodeon animated series titled T.U.F.F. Puppy. She is an expert in combat, weapons, and detective work. There's just one thing she can't eem to do: control the dimwitted and mischievous personality of Dudley Puppy. She is voiced by actress Grey DeLisle, who is notable for the voice of many other female cartoon characters.