The show is rather... expressive and hard to understand at the same time, but by the end Fëanor has gathered that A. Zuko can apparently set himself on fire with his powers or something akin to that (hey, he can respect that. He only hopes that in Zuko's case it doesn't mean that he's about to die. More seriously, whatever the exact power is, it's useful knowledge that whatever Zuko does it can make smoke rise from his nostrils but it would be even more useful to know what exactly it is. It really would have been good to ever have talked about that before.

Later.)

He nods sharply and after a last look at the people in their surroundings who all seem to act what he assumes to be normal, he points into a direction down a corridor. "[That way.]" He'll just start walking, seeing no reason to discuss things when they cannot communicate properly and simply expecting Zuko to follow, because that is what he is used to from his life.