[Naoto had worried for a moment that she'd perhaps Nanako uncomfortable with her informality, but when she sees the young girl beaming up at her, she relaxes and her worry melts away. She returns Nanako's smile with one of her own.]

All right, if you're sure you're okay with it, Nanako-chan.

[Naoto then looks a little surprised with Nanako reaches out and takes her hand. It's less that Naoto has a problem with the young girl holding her hand, and more that, from Naoto's perspective, she still felt more or less a perfect stranger to Nanako despite the earlier peculiarity of Nanako already knowing her name. Naoto looks up and around for any guardian who might be keeping an eye on Nanako and might take umbrage with her holding the hand of a stranger.]

Um, well, a little. I didn't get very far before you called out to me.