Number IX, otherwise known as Demyx, used to use this room as his residence. Debatably the weakest in the Organization, Demyx was beaten by Sora not once, but twice.

The first encounter was in the Underworld at Olympus Colloseum. Demyx was ordered to steal the Olympus Stone that would break the Underworld's curse that saps one's strength and renders their powers useless. He was also ordered to "liberate Sora's true disposition" in the process. He used his Sitar to command water clones, but Sora eliminated them all and Demyx fled.

Demyx's demise came when he challenged Sora in Radiant Garden. He used different melodies to control water and engaged in hand-to-hand combat with Sora. He fought poorly however, and quickly met the business end of Sora's Keyblade.

Demyx's room contains many racks of CDs, as well as a large turntable on which Demyx used to blast his music. In the corner is a stand for his Sitar, and a bed.