The Commander looks at her. He's wholly not surprised by her cat-like features. In fact, he already knew of them. The Agency was on top of this sort of thing. They had been investigating the experiments that had made her not human, and had been keeping an eye on her ever since. However, she might not be aware of this fact.
As for Lewis, he really can't be bothered to care /that/ much, either. The fact of the matter is, even rookie agents tend to believe that they've seen everything.
The commander says "Problem is that we think there might be more than just shamblers there." He clicks on the projector screen. There's one zombie that looks a bit more lean than others. It's also significantly taller. "We think there might be a runner in there. That's why we've hired you, Kat. All in all, though, we think that we'll be fine. It's your first field mission. We like to make sure there's not much of a catch."