[Korra winces on Tadashi's behalf, but she doesn't stop Hiro from trying to wake him. They're out of immediate danger for now, and it might be better for Hiro to come to terms with this before they try to move.]

I don't know, either, Hiro. [She bites her lip, feeling a little vulnerable for admitting that, but that's probably what Hiro deserves right now. False promises that she has no way to keep would only make things worse in the long run, wouldn't they?] I don't know if he'll revive either, but... until we know that he isn't coming back, all we can do is hope that he will.