Can you do more of the Lu Ten back from the dead AU?
That describes more than one AU of mine, so I have chosen the one where Zuko is brainwashed by the Dai Li, and while under Lake Laogai, finds his cousin. Continued from: [Link], [Link], [Link], [Link], [Link], [Link], [Link], [Link], [Link], [Link], [Link], [Link], and [Link].
Aang wakes up, with, what must be said, is perfect, and perfectly awful, timing. Lu Ten is just about to make his escape, when the Avatar opens his eyes and starts having a freak out about being on a Fire Nation ship, and about how he failed to save Ba Sing Se from being conquered by Azula (Azula? His little cousin, Azula? That Azula? Conquered Ba Sing Se?) So of course Lu Ten does what all good little Fire Princes do, and tries to follow him, because that's the Avatar! He should capture him and take him home to the Fire Nation, and come out of his captivity covered in glory! His father and grandfather will be so proud.
So of course when Aang ends up stuck on some driftwood and washed ashore by the kindly Moon Spirit, Lu Ten ends up washed up, half drowned, on the beach with him. And he's still half drowned and wondering if he really saw the Moon Spirit, or just hallucinated that bit, when the Avatar's friends show up. After the hugs and reassurances, the question quickly becomes what to do with Lu Ten. The problem of course is several fold. 1) he is a danger, because he just tried to pull a Zuko and kidnap Aang. 2) He was pretty useless about it. Zuko could have done better in his sleep. This shows that Lu Ten is still kind if not fully with it, and kind of needs to be taken care of. 3) And Lu Ten's dad is in prison for helping them-
Wait what? His dad is in prison for helping the Avatar and a bunch of teenage enemies of the Fire Nation? His cousin Azula, who last he checked was eight, conquered Ba Sing Se? His cousin Zuko, who is ten, which is, he supposes, not much younger than the twelve year old Avatar, but still ("I'm pretty sure I'm thirteen now, actually, I mean dates are weird with the whole being frozen for a hundred years thing, but...") is not only trying to kidnap the Avatar on the regular, but is apparently doing pretty well at it ("uh, we wouldn't go that far... Also Zuko's sixteen, and Azula's like, fourteen, we think? It's not like she told us.") Oh okay, Zuko is sixteen. He was captive for six years? Six years? Oh. Oh okay. Okay. Wait, who had his dad imprisoned? What do you mean Firelord Ozai? How did Uncle Ozai become firelord if his dad is still alive?
What the Avatar and his companions tell him is confused and disjointed, but what what explaination he does get paints a bleak picture, especially when they tell him that both his father and his cousin said that Ozai, and/or Azula would probably kill him if they found out he was alive. Lu Ten has no idea what to do, and finds himself trailing along after a bunch of teenagers ("Toph's twelve") by default. And when one of those teenagers ends up being dragged off to school, and then getting in trouble at said school, and having to have a parent teacher conference, Lu Ten is the only adult in reach. He works out in his head how much older he would be than his supposed son. If the Avatar is thirteen, and Zuko is sixteen, and Zuko was born when LunTen was ten, he would have been a father at thirteen himself.
Fortunately for everyone involved, six (it's six, right? Wow.) years of captivity have aged Lu Ten beyond what is expected, and he looks far beyond his twenty-six years, old enough to pass as Aang's father. He does his best with stolen clothes and his reflection in a pool of water in the cave they've been hiding in. The Dai Li kept his head shaved, and it's only had a little time to grow out into a spiky fuzz all over his head. He looks like a disgrace, his topknot shorn, the delinquent father of a delinquent son. But it's the best he can do. He isn't exactly surprised when the principal threatens his "son" with being sent to the coal mines. He also doesn't believe a word of it.
After Aang holds his little dance party, amd they all have to run out of town, he finds himself on the road with a pack of children, and is baffled by how many "adventures they find themselves in, impersonating spirits (a Fire Nation town shouldn't be in this kind of squallor!), getting taught by Piandao (who Lu Ten stays well away from, since Piandao could recognize him), dodging assassins, and running into secret waterbending blood witches. That last one was horrifying in so many different ways. She wanted... She tried to kill him. She tried to force the others to kill him. She... Was, at least on some level, a captive like him.
And at the end of it all, when they meet up with the ragtag "army" heading to storm the Fire Nation capital, he hears about the eclipse. And he decides that while the rest of them are trying to take on Ozai, he's going to spring his father. So, he slips away during the fighting and heads for the capital prison tower. Hopefully that's where his father is being kept. And Lu Ten might not have Zuko's ability to break into and out of almost anything, but it hardly matters, because he has barely made it inside when his father, having broken himself out, runs into him, and they leave together.
All this means is that when Zuko (who never did tell anybody about his cousin being alive, which is going to make his tearful reunion with his uncle and cousin a little less awful) shows up to the Western Air Temple, the Gaang is short one Fire Prince. And now they have a new one. Yay! And once he starts to become friends with them, they've got a whole bunch of questions about just what exactly is going on with his family. And yeah, the answers he gives are, well, they are... Wow, Zuko, no wonder you're so messed up!