Zuko listened with great interest as Yang explained. It's amazing that such a city was able to exist in their world. A place where all the separate nations could come together. It brought to mind the Harmony Restoration movement, and what he experienced in Yu Dao. He had wondered if a place like this could be possible, and apparently, it was.

But then there's something in what she says that brings all these thoughts to a hault.

"Wait... how can there be airbenders from the Fire Nation?"