Demyx is an Organization XIII member encountered twice during the events of Kingdom Hearts II. Using the element of water and a sitar to fight. Demyx is often thought of as a bad fighter by his fellow Organization XIII members, but really is just lazy. Demyx first confronts Sora in the Underworld, saying they picked the wrong guy for this one (referring to his own superiors who overlooked that he could not fight well). Defeated by Sora, Demyx runs off to be encountered later in the game. At Hollow Bastion Demyx confronts Sora once again who was off to fight the oncoming Heartless. Once again defeated Demyx fades back into darkness. In Kingdom Hearts: 358/2 Days, Demyx is a little lazy. He says that he would rather play his sitar, but goes when warned by Saïx.
 Journal Entries
 Kingdom Hearts II
 First Entry
Organization XIII's Number IX. Organization members all wear black coats, and it's said their numbers were assigned in the order they joined. In addition, their names share something as a mark of their brotherhood.
 Second Entry
Organization XIII's Number IX. He was surveying the world of Olympus, and even swiped the Olympus Stone. He's a lousy fighter.
Demyx called Sora "Roxas."
 Third Entry
Organization XIII's Number IX. He used a type of instrument called a "sitar" to control water...but he wasn't very good at fighting. Demyx was under orders to "liberate Sora's true disposition" while surveying the world of Olympus.
 Kingdom Hearts: 358/2 Days
No. IX DEMYX Prefers to kick back with his sitar, and leave the dirty work to the water under his command.
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