Glad that the not-Polish girl had finally stopped, Kazumi slowed to a stop herself, stopping several paces away. She wasn't exactly known for athleticism, but the blogger wasn't going to be crushed by a run as relatively short as that.

"...Why? That's what I wanna know..." Kazumi complained with a frown. Quickly realising that showing annoyance would probably just cause a repeat occurence, she quickly reigned it in and showed a slightly forced smile, instead, "uh, look, sorry if I scared you back there. I just, uh... well, you looked like you were in trouble, and I just..."

It was hard to explain her reasoning for helping, especially since it began with Kazumi watching her walking around. That certainly didn't put her on the moral high ground, but it wasn't like she was going to do anything weird!
Kazumi herself quickly glanced at the crowds behind her. As far as she could see, that guy hadn't followed them. For now, it should be safe for them to part ways, but...

Really, the strange little girl gave off such a strong aura of helplessness, that Kazumi felt it tantamount to abandoning a baby animal to fend for itself, if she were to part with the girl now. If she could gain this girl's trust, then Kazumi could simply walk her home, make sure she was safe... then blog about the ghost-character inspired by this girl.

"...anyway, if you don't mind, I can walk you home. Or something," the bespectacled young woman offered, "if that's okay with you, of course..."