Quite possibly the last character I'd expect to get developed! Very cool!
I had a similar notion to upgrade Agatha Harkness's old familiar, Ebony, who had been shown in the past to be able to transform into a giant black panther, and rumored to possibly be a demon, actually was a demon cat-person, part of the race that Tigra gained her powers from, and had been familiar to witches and sorcerers before Agatha, including Victor Von Doom's mother...