I guess what she'd think depends on who she is, and how much she really knows.

Does she speek English? My mind is on everyone thinks no, and our readers think no, but then half a book later she says something in English and it's a serious reveal. I'm not sure though. If she can't hear, what does it matter that she could technically understand? Hm, maybe if we involve reading...?

I don't want her to be a (maybe failed) ninja. I don't know, ninjas are stupid. But maybe? I think I'd just like to come up with some options for now.

So, okay. Who is she? What ideas and possibilities come to your mind?