Stormfall

Unreleased Rain Storm (レインストーム) is a Keyblade wielded by Aqua in Kingdom Hearts Birth by Sleep. It first appeared in Kingdom Hearts II Final Mix, it is obtained after the events in Destiny Island.

Design
Rain Storm is somewhat similar to the design of Oblivion, with a white and violet color scheme. The teeth on her Keyblade loosely resembles the crown necklace that Sora wears around his neck. The shaft is very similar to that of the Bond of Flame. The guard is white with jagged silver edges, not connecting to the shaft at the top. The keychain links and token resemble water drops.

In Kingdom Hearts II Final Mix, Rain Storm is seen in Xemnas's Chamber of Repose, along with Aqua's armor. Xemnas talked to the armor, addressing them as "friend." The Last Episode scenario of Kingdom Hearts Birth by Sleep shows that Xemnas has had the armor and the Rain Storm in his possession ever since Aqua sacrificed them to free Terra from the Realm of Darkness. They appeared alongside his complete being, Xehanort, in Radiant Garden when he was discovered by Ansem the Wise, Braig, and Dilan. The three took the Keyblade and armor along with them, as Braig carried an unconscious Xehanort.

Trivia

 * Rain Storm is also the name of one of Jack Sparrow's abilities in Kingdom Hearts II.