In all honesty, it didn't really matter to Richie if the woman knew he was following her or not. Unless she could somehow outrun him (which he didn't think she could), he wasn't going to just stop tailing her. It wasn't anything against her personally, she just happened to be the first person he came across. That, and there was something that just seemed... off about most of the people in Test City. It might have been easier to chase the sheep around, but Richie was almost sure they would taste almost like stale saltines or something worse. One thing he remembered hearing from Santanico was that each soul had almost a unique flavor and stale anything wasn't exactly appetizing.
Richie saw the woman duck around into an alleyway, so he moved with that unnatural culebra speed to settle himself against the wall opposite her in the alley. "Not your best idea to hide in the dark," Richie commented, his eyes turning reptilian to help him see in the dim light of the alleyway.
Noticing her stance, it seemed pretty obvious that she was a fighter, or at least thought she was. Richie didn't blame her and honestly, if he was still human, she might have been able to kick his ass without even trying. He had always been better at firearms and throwing knives than throwing a punch and his constitution was pretty sensitive. Now though, unless she could pry his head off with her bare hands, he would be good. "I don't really want to fight." All he wanted was to get rid of this hunger.