Although Madoka only has a regular teenage girl's stamina and speed, she's still doing her best to at least not give up and keep on running, even as she's slowly starting to get more tired as they keep running. But she's pretty sure everyone is already ahead of them by now, so she feels like can't stop and make them only lag even further behind.

At least it feels a little less bad knowing there's someone right here with her. Although he seems so young.. So she can't help but wonder-- "U.. um.. Once we get up there, do you have a way of dealing with those goblins..?"

She knows not to underestimate people based on appearances (that's what the whole magical girl thing is about, after all!) so for all she knows, Romeo could be some amazingly powerful wizard. But he could also just be a regular boy, in which case the responsibility would fall onto her to make sure he wasn't in direct danger, right?