[Spotting movement out of the corner of her eye, Marinette flinches slightly. It's only a few moments later, when Chara has come closer that she's able to relax a little. And then she's blinking at the little girl with the blade?]

R-right! I'll do that.

What are they? I mean... why are they like that?

[She was trying very hard not to ask if this little(?) girl was alone, because she didn't want to make assumptions, and she didn't know if doing so would upset her.]

I'm Marinette, by the way!