Zuko hadn't planned on becoming such a huge part of Katara's life. It just kept...happening. Somewhere along the way, she'd become this massive vortex he was incapable of avoiding. He just wanted to help the others save the next Avatar. Filling the void in Katara's heart was never part of the plan, but Aang being killed by the Phoenix King hadn't been part of the plan either.
After the Keyblade War, the world changed. All realms are now meticulously ruled by Master Xehanort, his fellow Overlords, and his countless henchmen. But his successor, Terra, has fallen in love with their latest project, the one person he could never have. How could she love the man who killed her master? How could Aqua ever care for the monster she vowed to hate forever?
[AU] Monster. Vanitas is a monster—at least that's what everyone says. That's what they've always said. He is a dark entity destined to leave a string of chaos and destruction in his wake and nothing can change that. He is what he is. Xion knows that, but that didn't keep her from loving him. He's a monster, and monsters aren't capable of loving someone in return, right?
What if Aqua was able to take Ven back to Master Eraqus? Xehanort would get nowhere without him, and this simple action set a new future into motion. Hoping to change the course of fate, Master Eraqus informs Terra and Aqua that they are victims of a powerful, predestined bond called a Keychain. Will they accept this intimate link or will their cruel fate truly be inevitable?
Aqua had always been quiet and contemplative. She longed for the land, the Keyblade wielder, and an immortal heart. Aqua could gain all of those things, but only if Terra loved her more than anything and vowed to be true to her forever. She cut out her tongue and relented her fins to be with him, but would it be enough? [Hans Christian Anderson's The Little Mermaid AU]
[AU] When Terra is finally able to leave his stepfather's manor, he vows he will never look back. He keeps this vow until a dying Xehanort demands his return. Grim circumstances force him to return with Aqua to attempt to gain closure and his inheritance, but will all the greed, temptation, and darkness cause him lose himself and Aqua to his half-brother, Xemnas, in the process?
On wedding days, the Fire Nation looked to the future with optimism and joy. On Zuko's wedding day, Katara delved into their past with a heavy heart and prepared to relive the sacrifice she made when the war ended, when Sozin's Comet left the tarnished sky, when the fire lilies died...