Stormfall

Rainstorm (レインストーム) is a Keychain for Aqua's Keyblade which appears in Kingdom Hearts II Final Mix and Kingdom Hearts Birth by Sleep. Aqua obtains it after visiting Destiny Islands.

The Rainstorm shares its name with one of Jack Sparrow's action abilities in Kingdom Hearts II.

In Kingdom Hearts II Final Mix, Rainstorm is seen in Xemnas's Chamber of Repose, along with Aqua's armor. Xemnas talked to the armor, addressing them as "friend." The Final Episode scenario of Kingdom Hearts Birth by Sleep shows that Xemnas has had the armor and the Rainstorm in his possession ever since Aqua sacrificed them to free Terra-Xehanort 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.

Design
The Rainstorm Keyblade's guard is circular and somewhat jagged around its edges. The upper half of the guard is black, the center is grey, and the bottom of it is white. The handle is a featureless, grey rod. The shaft of the Keyblade is thin and navy blue in coloration, except for the tip, which is silver. The base of the shaft also sports two diamond-shaped bumps. The Rainstorm's teeth are comprised by a rectangular frame lined with four short, blunt spikes. This frame and the spikes are all navy blue. The teeth also have three silver pieces bent at right angles; two on the inside corners of the frame and one on the inside center of one side. The Keychain links and token resemble water drops.