Kitty Katswell is one of the main characters of T.U.F.F. Puppy, and is T.U.F.F.'s number one agent and a member of Team Sonic. 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.