, also known as , is a
fictional character from
Square Enix's
video game franchise
Kingdom Hearts. Having first made cameo appearances in the game
Kingdom Hearts II, Aqua was introduced in the 2010 prequel
Kingdom Hearts Birth by Sleep as one of the three protagonists. In the title, Aqua is introduced as a
Keyblade-wielding warrior living in Land of Departure training under
Master Eraqus alongside her best friends
Terra and
Ventus. Following the disappearance from
Master Xehanort, a comrade from Eraqus, she and Terra are tasked with searching for him as while protecting the worlds from creatures known as Unversed. However, she is also told by Eraqus to watch over Terra's development and bring back Ventus who left the Land of Departure.