The Key

The Key is a musical composition by Yoko Shimomura that appears in the Kingdom Hearts series.

Appearances
"The Key" appears in both cutscenes and boss battles. It is used in climatic moments, especially scenes related to Keyblades or the χ-blade.

Ventus's Story

 * Badlands: "Former Master", "Seeking the Truth"

Aqua's Story

 * Keyblade Graveyard: Ventus-Vanitas

Kingdom Hearts χ[chi]

 * Keyblade War: "Luxu's War", "As the Bells Toll"

Kingdom Hearts Union χ[Cross]

 * Main Story: "Fall to Darkness", "Separated"

Kingdom Hearts 0.2 Birth by Sleep -A Fragmentary Passage-

 * Dark World: "Keyblade of Darkness"

Albums
 File:Kingdom Hearts Birth by Sleep and 358 2 Days Original Soundtrack Cover.png|Disc 2, Track 22 in the Kingdom Hearts Birth by Sleep & 358/2 Days Original Soundtrack 