Watching the white girl's reactions to the guy interacting with her, Kazumi started to wonder if he was trying to pull something shady with her. Certainly, it was pretty obvious that the ghost-girl template was intimidated by him in some way, even if she couldn't hear what was being said.
Kazumi rubbed the back of her head, wondering if she should step in. After all, it wasn't any of her business, and if it was a misunderstanding on her part...

...Damn it, that little girl was just too vulnerable-looking.

Kazumi took a deep breath to steady her nerves, and walked towards them, her mind quickly formulating a believable story to tell.

"...Shiro-chan! There you are!" the bespectacled young woman greeted the girl and strange man with a strangely-high-pitched voice. She was already kicking herself for choosing such a cliche name, but it was a bit too late for a do-over. Better to continue on with her masterfully-crafted story.

"Thank you very much for finding her, sit," Kazumi bowed slightly to the man, a forced smile on her face, "Shiro-chan here is my, uh, cousin, visiting from... Poland. She's kind of silly, and ended up lost. How about that?"

Placing a hand over "Shiro's" shoulder, Kazumi gently guided her to turn as she attempted to leave the scene, "thanks again, sorry for the bother!"

[i]This is one of those 'nailed it' moments, right?[/i] Kazumi couldn't help but compliment just how well her ruse seemed to be going. Now, as long as the cute girl played along, at least until they were out of his sight, and as long as he didn't insist on following them for some reason, there would clearly be no reason to doubt her story!