[That's a point. He feel uneasy to let her go there alone. Would sending both Ellie and Rio there be safer? Who knows how long they have until their captors get to them--]

I don't want to send you there alone and, well. [He glances at Ellie.] I'd want one of us to go with you, but I dunno how well Ellie can...

[Um.]

Crawl through in the vents.

[Not like he's implying she might be too big but--]