Dave Cockrum’s Black Cat, a character he pitched to DC in the early 1970s. They didn’t bite, but he liked the costume so much that, after a couple modifications, he decided to give it to another character of his who went on to become more important, Storm.
“What I had in mind was to make her the most powerful woman in comics,
and the most beautiful woman in comics, and I think I’ve succeeded,” Dave Cockrum told the audience at RiverCon ‘75. “If
I can find someone who looks like her, the two tickets to Tierra del
Fuego are right here in my pocket.”