Tigra

If you guys think I'm going to break my pretty claws trying to scratch my way in... go fish!

—Tigra (trying to get through a shield made by the Molecule Man)[source]

Greer Nelson (née Grant)[1] formerly worked as the costumed vigilante known as the Cat, enhanced by Dr. Joanne Tumolo who gave her cat-like powers tied to her costume.[1] She was later mutated into Tigra, a Human/Tiger hybrid, created through a mystic ritual that bound her soul to one of the Cat People,[3] a race of humanoid cats created during the Middle Ages.[25] Powered by the Cat's Head Amulet, she can transform from her human form to Tigra, and became the Cat People's champion.[3] She was later recruited into the Avengers and became a prominent member of the Earth's Mightiest Heroes.[24]