That's Firelord Azula to you.

What would you think, if, after getting advice from Iroh, Zuko and the gang travel to the spirit world in order to find Aang’s people so that Aang can teach the air acolytes more about the air nomads? But Zuko gets attacked by a poisonous spirit and reverts back to pre Season 2 Zuko after losing some of his memories due to the poison fogging his mind. Zuko is confused and doesn’t know why he’s firelord. The gang try to explain things to him, but it only causes him to become even more confused. Aang and the gang then leave Zuko behind to spend more time with the air acolytes. While they’re gone, Zuko is very uncertain about what to do, but soon corrupt advisors convince him to restart the war. Zuko doesn’t remember his friendship with Aang, but he hears that he once joined Aang, so Zuko assumes that Aang once brainwashed him into joining team Avatar and turning against his Father. Zuko intends to be a much greater firelord than his father, and he and his army raid the air acolyte settlement in their airships in order to hunt down Aang once again, and end up burning down the settlement. Aang and the gang wonder why Zuko chose to hunt them down again. Aang eventually comes to the conclusion that Zuko backslid due to bad advice from his advisors and because he lost some of his memories. Aang then travels the nations looking for a cure to help restore Zuko’s memories.  

Azula escapes from the mental institute and Zuko sends bounty hunters after her to capture her. Soon, Azula gets bitten by a snake, so she finds help in the village of Jang Hui where she is healed by two waterbenders, who are taking refuge there. Jang Hui is the village Katara helped in The Painted Lady. And the villagers aren’t on good terms with the firelord. The villagers accept her and assume that she’s on their side because she’s made an enemy of the Firelord. The villagers teach Azula how to heal people using firebending techniques inspired by water bending, and she ends up becoming a fisherwoman because it’s a fishing town. She starts to warm up to the town, but one day she overhears the waterbenders talking about sneaking out to sabotage the smelting factory(which is currently undergoing reconstruction) in order to help the villagers. Azula offers to join their mission, and the three sneak out to destroy the factory, but she betrays the waterbenders over to the fire nation in hopes that she might bring glory to the fire nation. But now that the waterbenders are captured and eliminated, the town is defenseless. Zuko’s army burns the town down leaving few survivors. Zuko didn’t exactly authorize the attack, but he did give his generals permission to do whatever it takes to stop the villagers from trying to halt the rebuilding of the factory used for the war effort. A few survive and declare revenge on Azula for what she did.  

Azula starts to feel terrible about betraying the people who saved her life and indirectly causing the village to be destroyed, since she didn’t know it would be destroyed. And she holds Zuko partially responsible for destroying the village. After wandering around, Azula looks through a telescope and sees Aang try to save a fire nation village from a volcano, and she also sees Zuko. Zuko does nothing after his corrupt advisors tell him to leave the village, saying that Aang will probably die, so Zuko runs away. But Aang manages to save the village from the erupting volcano. Azula gets accepted into the gang when she uses her new healing abilities to heal Aang, who is wounded by the volcano. They reluctantly team up to stop Zuko.

After wandering around the Earth Kingdom to look for a cure for Zuko's memory loss, the gang sees a massive stream of fire pour down from a few fire nation airships hovering above a village. The stream of fire burns the village to the ground, leaving few survivors. It turns out that fire nation scientists developed a highly addictive serum that can increase the fire power of any fire Bender. The downside is that prolonged use of the serum results in loss of the senses, and eventually death. Senses such as taste, smell, sight, touch, and hearing. Zuko intends take the serum and lead a fleet of airships to finish what his Dad started by burning the Earth Kingdom to the ground. After learning what Zuko intends to do, even Aang feels tempted to give up on him.

i havent seen you online here in years lol