That answer seems more confusing to her than not knowing, lips pressing together. That people arrive accidentally more than occasionally is difficult enough to comprehend, but being somewhere other than Earth? That seems downright impossible. She has no way to leave a country let alone a whole planet.

Then again, she hasn't even a certainty in her own identity.

At the very least, she manages to nod her head to him once in a return of greeting when she can't quite muster up following a proper script. She hesitates, then answers his question, "...I-I'm pretty sure? I don't remember much about it but I know I saw that several times."

In an effort to make sense of this place called Nautilus, she asks, "How does someone get from Gotham to here?"