Tigra (Greer Grant) was originally introduced as the non-super powered crime fighter The Cat in Claws of the Cat #1 (Nov. 1972), she was co-created by writers Roy Thomas & Linda Fite, and artist Marie Severin. The Cat mutated into the superpowered were-woman Tigra in Giant-Size Creatures #1 (July 1974), by writer Tony Isabella and Don Perlin.
The Claws of the Cat was released as one of a trio of Marvel Comics specifically aimed at a female audience, along with Night Nurse and Shanna the She-Devil. The series only last four issues, and each had a different art team. Marie Severin was paired with acclaimed artist Wally Wood as inker for the premiere issue, followed by Severin and inker Jim Mooney on issue #2; then newcomer Paty Greer co-penciling with 1940s legend Bill Everett (who also inked) in issue #3; and finally Jim Starlin & Alan Weiss co-penciling the finale, with Frank McLaughlin inking.
The Cat next appeared in Marvel Team-Up #8 (April 1973), but the character was then totally revamped as the super-powered, part-animal Tigra in a two-part story in Giant-Size Creatures #1 (July 1974) and Werewolf by Night #20 (Aug. 1974). Tigra went on to guest-star often throughout the Marvel Universe and later made her solo debut in a 15-page story in the black-and-white magazine Monsters Unleashed #10 (Feb. 1975). This was followed by a brief run in the series Marvel Chillers #3-7 (Feb.-Oct. 1976), and a single appearance in Marvel Premiere #42 (June 1978). She has been a long-time member of the superhero-team, The Avengers.