Waterbender!zuko - Tumblr Posts
This has probably been done a million times, butttt.......
AU where Zuko was born a Water Bender.
Call it the spirits fucking with Ozai, call it "technically the avatar is the master of all four elements and Zuko's a descendent of Roku".
Zuko was born a Water Bender. Zuko kept it secret from his father at the request of his mother.
Ursa went out of her way to hunt down a Water Bender to teach her son in secret, lying and saying that the Water Bender was just a nanny because Zuko required more work than Azula.
She got Kya, of the Southern Water Tribe.
Kya, who isn't actually a Water Bender.
Ozai knows his son is a bender, but he thinks he's being spited because Zuko refuses to Fire Bend near him. When he challenged Zuko to Agni Kai, he did it to "teach his son a lesson", but also to finally give Zuko an excuse to Fire Bend.
But Zuko didn't.
Zuko got burned and banished, and Kya went with him and Iroh.