[Zuko is as calm and serious as ever. Though there is a small smile that indicates that he is happy to see Sokka regardless. The questions were to be expected. He had plenty of them when he first arrived too. So he is willing to answer anything that he can. But first thing's first.]

You're in a place called Luceti. Its not even our own world. We were brought here and these wings keep us alive.

[Though Zuko's own are actually concealed under his clothes.]

[Appa also gives Sokka a big sloppy bison lick when he gets close enough.]