[Hm. Yusei's blank expression makes him look like he doesn't believe whatever Kaneki's saying for a good few seconds, but then he nods.]

I've heard of stranger things happening. [Now, how to resolve this?]

If that's the case, turning our backs on her to run might just let her catch both of us in whatever she's doing. [He pauses to throw another rock at her head, making the girl duck with a curse.] We'll have to stop her here, before she gets anyone else.

[Seriously. Doesn't this brat have anything better to do?]