Greer first appeared in her own self-titled comic book titled . . .
The Cat.

from issue #1, cover-dated November 1972,


Unfortunately, that book only lasted for four issues, but Greer did at least get to meet up with Spider-Man in Marvel Team-Up #8 (April 1973):


It was in 1974 that Greer would become transformed from The Cat into
. . . Tigra the Were-Woman!

from Giant-Size Creatures #1 (July 1974):