[Naoto doesn't actually hear Rise coming, so Rise speaking up startles her-- she jumps slightly off the ground, actually, a tiny gasp of surprise leaving her mouth.

She whirls around, and it's obvious she's trying to compose herself before she speaks.] --I!

...I mean. No, that's quite all right, thank you. I've simply just been trying to acquaint myself with the campus for future reference. [That doesn't seem to jibe with her actions earlier, does it?]