Aubade

The Aubade (オウバードロード) is a form of the Kingdom Key that appears in Kingdom Hearts 358/2 Days. It is one of two unique weapons that Roxas and Xion can wield. The Kingdom Key is changed into the Aubade when the Mystery Gear is equipped.

Design
The main structure of the Aubade is a chokutō with a black handle, gold pommel, and gold rain guard. The Keyblade’s guard is split into an upper and lower half. Both halves are gold and lined with spikes, but the spikes are more prominent on the upper half. The teeth of the Keyblade are comprised by a gold semi-circle with a turquoise center that is lined by long, gold spikes. The teeth connect to the main blade by a thin fluer de lis, causing it to vaguely resemble the Heartless symbol when viewed from the side. The keychain token is shaped like a diamond lined by short spikes. Its upper half is gold and its lower half is turquoise, and there is a large, X-shaped gap in the center of the token. The gold sections of the weapon resemble flashes of light.

Trivia

 * The names of Roxas's weapons generally refer to either the pain of parting and loneliness, or light phenomena. The Aubade is the only weapon to do both.
 * This Keyblade, along with the Umbrella, has a much faster swing speed than the others.

Etymology
An "Aubade" is a song or poem evoking dawn which is traditionally a love song of two lovers parting in the morning. While not fully romantic in nature, the most defining aspects of Roxas's personality occur in Twilight Town: after leaving the Organization, he travels to Twilight Town; there, he encounters and is forced to defeat his close friend Xion, destroying her and giving up even his memories of her.