What she looks like:
I wouldn't be surprised to walk into my local S&M club and find one of the dominatrixes-for-hire dressed exactly like Rayne. Then again, it's been weeks since I patronized The Gimp Whip, so who knows what's going on there now. That being said, it's hard to imagine anyone looking like Rayne and not engaging in some sort of painful activity.
Who she really is:
This half vampire, half human hates evil. In fact she hates it so much that if someone even so much as attempts to become a Nazi, she disembowels and/or removes his limbs and head. So if you're a Nazi, I'd play it safe and avoid The Gimp Whip, just in case.