Sokka heard it. It wasn't like Duo could hide it as well as he used to. Most of them couldn't anymore. He'd seen how even Toph had started to slow under the weight of what the castle brought. Shadow? Harth? The Queen? And that sense of being trapped... ? Some how it really was worse than any of the threats the Fire Nation and Ozai had brought down on them.

Still, he managed to echo the smile back if nothing else, half heartedly at that.

"... yeah. Thanks."