I got kind of fed up waiting for  siegfriednox to carry on with his 'CatFight' series, so I took matters into my own hands, using one of the test sketches he sent as a base.
Hopefully he'll do the official version soon, but I think mine turned out pretty well anyway, and I always enjoy working on his lineart.

In this picture, we have Dorcan's evil grandmother vs Ren's own character, 'Rin. Or to put it another way, someone with about 2000 years' experience of murder and soul-stealing against one of the most evil ladies in her own universe. I'm not sure who i'd put money on.

Colouring was done from a multicoloured digital sketch, which involved a major headache to render it down to B&W for colouring. I do like how Julei's shiny "screw you, I'm an evil succubus" clothes came out.

Ren, please finish the series :3

EDIT:
Katherine's ref sheet is here:
http://www.furaffinity.net/view/4640932/
...and Julei is in Project Future.

The official CatFight series starts here:
http://www.furaffinity.net/view/8038345