Mrs Tabitha Leon is the strangest of all teachers at H.I.V.E., as her consciousness was transferred from her human body to a cat's body when one of Professor Pike's experiments went very wrong. She is the head teacher of Stealth & Evasion and Shelby Trinity is one of her star pupils. She is granted speech through a gem on her collar, which is connected to H.I.V.E.mind. She appears in Higher Institute of Villainous Education, The Overlord Protocol, Escape Velocity, Dreadnought, Rogue and Aftershock.

She dislikes Professor Pike for his experiment, although she admits there are advantages to being stuck in a cat's body.