When I met Sierra she did have a really bad smell to her in my opinion of things. I am not sure if it was her breath or face that smelled, but it was very disturbing. I can also say that when I was smelling this, I could only think that she had done ass to mouth (or face) in the very recent past. I only say face because the smell was still there when she didn't talk. I guess I expected too much from a proudly drugged up (former?) prostitute.
I think she also has a face like a horse in person.