When they said Zuko goes on a date in??Ba-Sin-Se, I think that the girl who was with the refugees (The mute girl) might be Zuko's date.?? Think about it, they are sitting next to eachother, look similar, I think she has similar coloring to the mystery person.?? It could be probable.?? I got this from the spoiler article mostly (I READ IT AFTER THE MOVIE, NOT BEFORE to see if it was correct about the spoilers, but I read no spoilers).