and you want him wearing... what, a black robe? I would try black leather, but I dont think I have a good enough idea of cougar anatomy, let alone a cougar that walks on its hindlegs, and I just think if I did something that clearly distinguished the legs that it would look really bad... so a robe?
If you have problems with the legs or so (following Kimahri's body), you can make it normal, I'll see what I can do myself then. Not really a robe, just a very long mantle. Robe is what we don't want to do.
Actually, take a look at this, I did this on hero machine:
Ok, this is something like this creature in real display (ofcourse the details are nothing like cougar because the hero machine simply did not have resources and nevermind that cat down there) what interests you here are the clothes and colors. As you see it's not a robe but a fancy mantle covering a bit of upper body and goes all the way down the back (like on that picture where woman is blowing monsters dick). The creature is, in fact pretty much naked except for what you se on the pic (bracers on hands and legs, and that eastern-style belt, no pants, no shoes, no shirts or armor). The colors are also with what you should be coloring. Ashy gray and black.
If you're having problems with a particular detail, you can always try to bypass it, I won't have problems editing it. Also don't bother with some details from this last pic, like the hair. Nevermind that or anything else, this last pic is important solely because of clothes and colors. All other guides are in the first post where links are (e.g. face).
As for the anatomy, you can make it more or less look human if that is easier than making a Khimari body, what I'd love is that you try making his face right. I failed, and it's really imporant. Cougar face.