Leia has a good point, really. And it's even better that she's actually saying it out loud, because Madoka hadn't quite thought of it herself. It makes her cautiously glance back at the woman once they do arrive at the supply tent, and then she cautiously looks ahead into the tent..

.. but it's so dark in there that it's really hard to see if there is trouble in there or not.

"I can't hear anything in there.." She instead says. It's just about the only thing she can go by right now.