Thirteenth Discretion

"Thirteenth Discretion" is a musical theme composed by Yoko Shimomura that appears in Kingdom Hearts Chain of Memories and Kingdom Hearts III.

Appearances
"Thirteenth Discretion" appears only during cutscenes, typically those involving Organization XIII.

Sora's Story

 * Castle Oblivion: "To Lose and Claim Anew", "Got It Memorized?", "When Sleeping Memories Awaken", "The Smiling Siren", "The Key to the Plot", "Larxene the Ruthless", "Vexen the Scientist", "Marluxia's Graceful Blade", "I Am Vexen", "Eliminate the Traitor", "Conspiracy of a Rebellion", "Larxene's Sneer", "Axel's Dancing Flames", "Axel Vanishes", "Phantom Promise or Not-"
 * Twilight Town: "Memories That Bind", "Vexen's End"

Reverse/Rebirth

 * Castle Oblivion: "The Organization", "The Other Hero", "One Who Walks in the Twilight", "Zexion the Tactician", "Vexen and His Replica", "Memories of Lies", "Obtaining Riku", "Lexaeus the Taciturn", "The Tactician's Move", "A Card of Home"
 * Destiny Islands: "Lost Memories"

Kingdom Hearts III

 * Kingdom of Corona: "Marluxia's Request"
 * Arendelle: "Thirteen Darknesses"
 * The Caribbean: "A Stride for All of Us"
 * Twilight Town: "Atonement"

Composition
"Thirteenth Discretion" is approximately one minute and twelve seconds long and plays at a tempo of 108 beats per minute. It is in 4/4 time and appears to be atonal. "Thirteenth Discretion" does not have an introduction or conclusion, allowing for smooth transitions between loops. The instrumentation consists entirely of strings, with basses and cellos using bows, and half of the violins using pizzicato while the other half uses bows.

The piece gives off a very ominous feeling. The pizzicato strings play a chromatic ostinato while the lower strings provide a low drone. The atonality adds to the general sense of wrongness.