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She watched the girl, Xul, crumble for days. She was only 16. There wasn’t really much she could do aside from holding her close and telling her that it would pass eventually.

It was a rough job really, the job she did, trying to help those suffering from what everyone else called the ‘the insanity’ they were “crazy”, “sick”, “unlovable”. She much preferred to call to think of them as those who just needed someone to tell them are cared about…loved. A good number of her patients were in a state of distress pretty much all the time, Xul was one of them. These patients (young...

Azul is Spanish and Portuguese for blue, possibly a reference to Azula's Firebending.
Her name may also come from the Sanskrit term Asura, a Hindu term for demon.
Azula's name was originally going to be "Zula".

In some 阿凡达 comics, her name is mispelled "Takara" instead of "Katara".
Katara's voice actor, Mae Whitman, has previously played the part as Rose in American Dragon: Jake Long.

The Southern Air Temple is the only episode in which the 标题 screen, which denotes the chapter and book, does not have a white background (the background is the sunrise).
According to the Nick.com's website...