Prologue

Azula cares for her brother, because instead of listening to her father she researched.

Or Azula is the Avatar, Aang is just an air bending kid who got trapped in ice, and while Azula doesn't understand half of the people's emotions she does her best.

Or Ursa actually was a good mom to both her kids, Azula was smart enough to figure out her dad is a bitch and Zuko is clueless.

No major pairing, and just hints of any that aren't the parents.