[And he's looking on warmly. With everything he's lost, he's so glad that one of the first friends he's made in this world has returned. And what's more, she remembers him.]

I'm really glad to hear that, Sabriel. As for the festival? It's in honor of Avatar Yangchen. It had to do with a dark spirit she defeated. It involves fun stuff like bowing to a statue and eating air nomad food and flying kites!