I don't know why you're worrying about copyrights when Capcom's kept this franchise dead for about half a decade now. I wonder if this is the result some kind of fushion "accident" involving a certain shaman.
No offence taken. I'm surprised I don't get more comments like this. I'm sure it seems strange or possibly offensive if you don't share certain kinks.
I'll try to answer your question as directly as I can. I drew this because not only do I like stuff like this, I also like to share art with other people that like stuff like this. The downside to sharing is that people outside the target audience can wander in and see things they'd rather not see, and for that, I am sorry.
Actually on that note, I'd just like to say that Katt, Rei, Cray, and Lin are all of the "Woren Tribe." They sorta became a permanent race in the game after BoF II. If you pay attention you can see other recurring characters races aside from the Dragon Clan and the people of Wyndia. (Namely Manillos, the fish people, and Highlanders, the monkey people like Sten from BoF II.) Sadly, Lin lacked the appeal that Katt had. That and they did kind of a bad job with BoF V...