...

That is a little girl. And a ghost. Of another little girl.

(Also toys, but those are more background info that she doesn't need.)

Sonia has encountered enough unusually not-evil monsters here that she doesn't attack immediately. (Though she does have her hand on the whip. Just in case.)

Instead, she approaches, trying not to look like she's ready to beat the hell out of anything that looks threatening. That tends to upset people, when children are involved.