Greet Nelson was subjected to treatments meant to enhance her physical prowess and make her the greatest female athlete in the world -- but something else happened. She was transformed into a fur-covered cat woman, and gifted with all the graces of a feline -- heightened speed and agility, enhanced senses, and dangerously sharp claws. As Tigra, she can be as playful as a kitten, but when trouble arises she becomes a savage warrior. The symbol on her belt joins Tigra with Earth's mightiest heroes, and she heeds the call, "Avengers Assemble!"