Teloch asked: The siblings somehow get multiple identical, or slightly varied, copies of themselves. What do they do?
They're both gonna have a pretty intense identity crisis, either by over-analysing any mistakes their copies make, no matter how small, and assuming that is somehow evidence that they themselves are evil/broken, or by developing an inferiority complex by seeing their clones being "better" than them, or possibly even both at the same time. Add in Azula's psychosis and you got some perfect nightmare fuel (also, Ty Lee is gonna be giving the Original Fire Siblings all the hugs because she knows that pain very well XD )
That being said, Azula is absolutely gonna fuck herself at some point, likely multiple times, with multiple versions, and her brother is gonna looooooove finding out about this. Zuko is both terrified and on cloud nine once he realizes there are now a ton of Azula's running around, and his sister can't help but like the thought that she now has a bunch of dum-dums to torment/play with it - Zuzu has always been her favorite toy after all. They both can 100% tell when they're interacting with a clone and when they're talking to their actual sibling, and if the copies have at least somewhat distinct personalities, they're likely to recognize which copy is which as well.
If they're not together yet, and maybe even in denial about their feelings for each other, it'd be really funny if their clones shamelessly flirt with the Original Fire Siblings, and have affairs with the copies of "their sibling". Also, I'm a degenerate, so I say they're all gonna have at least one huge orgy.
It is very likely that, at some point, Azula is gonna try to use her clones as an army, either against Zuko or to protect him and their nation, depending on when this all happens. Zuko is either reluctantly gonna do the same because he knows that a literal army of Azula's is more than enough to kill the entire planet, or he'll do it after Azula basically explains that this will destroy all of their enemies.