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human
[Avatar: The Last Airbender] Aside from looking cool, why does Azula bend blue fire?

We have already found out that Iroh and Ozai are two of the most powerful firebenders ever, and Zuko is proficient enough to be able to redirect lightning. Why do they all use regular fire and hers is different?
gpt
Azula is a firebending prodigy, and her blue flames are significantly hotter than the orange fire produced by other firebenders. 

She can produce a far larger amount of flames than others, last longer without tiring, shoot herslef into the air by creating a jet of flames, and condense the flames in a way which lets her cut through objects.