Whatever Kairi had expected to "attack her," an apple core was certainly not on that list, but it's enough to cause her to jump in surprise. "W-What??" And then she's whirling around to face the direction it came from, as though she had anything she could possibly use to defend herself (what, there were Heartless that used bananas, okay).

But it's just a woman.

Kairi blinks.

Normally she might be offended if someone tossed an apple core at her, but this is another person, so Kairi rushes after her. "Excuse me!"