"...more than half a day..." he was about to ask if she could last, but realized it was a stupid question.

He gathered her on his back once more when she was ready after securing the water container again, taking a sip from it before storing it away... and as soon as he could, he was running.
Getting her to safety, after all, was the least he owed her. "..you..." he murmured after a while. "...saved my life... back there.."