The cat kind of looks like the Viper on the wall behind it.
Yeah, he's giving the Sneaky Pete look!
Most cats are not really interested in clawing leather, but they could sharpen their claws on the door carpet.

What I'd worry the most about is one getting comfy, sleeping, peeing in the car!
Animal ***** is one of the hardest smells to get out of a car (you need to use enzyme cleaners).
Usually your own pets won't *** in your car (for obvious fear reasons) I've found a couple stay cats eyeballing the car for a quick nap, when it's parked outside at friend's houses with the top off and windows down.
So I usually cover it and roll up the windows to be safe.
Eager big dogs also get me jittery as some love to jump up on the door to get a sniff of you with claws gripping the paint!

Dogs are pretty smart though and can sense your horror as they approach the car, and I have only had close calls here. No animal damage so far.

My worst so far is some stupid teenagers egging my car (while I was standing there)!

Animals!