The first official sequel to an existing Final Fantasy game, Final Fantasy X-2 continues the story of Yuna as she and two female companions set off on a combat-filled adventure to rescue hero Tidus from captivity. Taking place two years after Yuna's epic battle with Sin, the game also stars Riku and a new character named Paine. Once again actresses Hedy Burress and Tara Strong reprise their roles as Yuna and Riku, respectively, and are joined by Gwendoline Yeo as the voice of Paine. While many of the settings will be familiar to Final Fantasy X players, albeit expanded upon in certain areas, a number of changes have been made to the core game engine.
The Sphere Grid used to build a character's class has been replaced with a job system that has characters instantly switching between roles during battle. Jobs are represented by costumes, with each transformation influencing a character's hit points and abilities. Yuna, no longer aided by the powerful spirits known as Aeons, has learned the fine art of pop singing, which can lull enemies into a daze long enough for others to attack. The turn-based battle system used in Final Fantasy X has also been dropped in favor of "Active Time Battle" found in previous installments. The game's structure has changed as well, with players being given a series of missions to undertake in any order instead of following a scripted path towards the conclusion.