The new Kingdom Hearts, Aqua Pop! Vinyl is here! Aqua is the main protagonist in the Kingdom Hearts Birth by Sleep – known as a Keyblade master she is the only one of her peers to have acheived such a title. Following the battle for the X-Blade, Aqua took on the realm of darkness to save a friend, and was trapped inside alone. After losing her Keyblade she is cast into the abyss.