Always with the reasons why. She understood, of course, seeing as how they were entirely strangers to each other, and a random individual stepping forward to pry into any details at all could seem too overly forward. Pair that with recent events in the city or a past filled with unsavory individuals and there were all kinds of reasons that he could have for keeping his guard up.

But that's what the truth was for.

"No reason at all, truthfully." she answered, essentially repeating her answer from when she'd met him in the library. What was it that she wanted then? Nothing, really. Aside from also some fresh air on the roof, she was just here. So she follows it with just a(n attempt at a) smile (being a zombie had its downsides okay) and a comment.

"Curiosity, really." a pause "Or a chance to fill the time."