Kingdom Hearts: Chain of Memories / KHCoM

Organization XIII
The Organization XIII is an organization of Nobodies lead by Ansem's Nobody, Xemnas. The Organization come across Sora for the first time at Beast's Castle, they begin by corrupting Beast and trying to turn him into a Heartless, so Sora will defeat him and offer his Heart to the Darkness, like everytime Sora defeat a Heartless, their Heart runs free in the Darkness and ultimately returns to Kingdom Hearts.
Organization XIII are after Kingdom Hearts so they can make themselves complete - so they can have a heart. Below are the members of Organisation XIII and their original names:
Organization Number I, Xemnas is the leader of Organization XIII, he is the Nobody of Ansem and is using Sora to defeat the Heartless and collect their Hearts.
Organization Number II, Xigbar's original name was Braig and like the other Organization XIII members he was one of Ansem the Wise's lab assistants. He appears in the Land of Dragons and uses Sora to defeat a Dragon Heartless.
Organization Number III, Xaldin's original name before he becamse a Nobody was Dilan. He manipulates Beast to try and turn him into a Heartless, but when his original plan fails he captures Belle and the Rose to provoke the Beast and Sora.
Organization Number IV, Vexen's original name was Even however he is now deceased after Axel killed him in Twilight Town. He was the scientific genius whom made the clone of Riku, Replica Riku.
Organization Number V, Lexaeus original name before he became a Nobody was Elaeus, Lexaeus was a strong warrior however he was killed by Riku in Chain of Memories.
Organization Number VI, Zexion's original name before he became a Nobody was Ienzo, however he is now deceased. He never liked dirtying his own hands and avoided trouble, however his own plans backfired on him and he was killed by Replica Riku.
Organization Number VII, Saix's original name is unknown but he posesses a huge sword which resembles Sora's Keyblade. Saix is extremely powerful and although he is only Rank VII in the Organization he is thought of very highly by the other members.
Organization Number VIII, Axel's original name is unknown, much like his purpose in the Organization. His true intentions are to turn Sora into a Heartless for his own needs, and is later revealed that he has turned his back on the Organization and is seen as a somewhat loose cannon. His weapons are two Charkams and the ability to master the Fire element.
Organization Number IX, Demyx isn't a very dangerous person and he prefers not to fight, but under the circustances he is forced to. He fights using a Sitar, which is an instrument very similar to a Guitar, also he wields the Water Element and attacks using Water Based Attacks. Sora first fought him in the Olympus Coliseum Underworld, then later on the fourth visit to Hollow Bastion.
Organization Number X, Luxord is the Organization Member who causes trouble in Port Royal. He is a gambler and his primary weapon is a deck of Cards. He can also freely wield Time, speeding it up and slowing down at he wishes.
Organization Number XI, despite his extremely low Rank in the Organization Marluxia planned to overhaul and take over the Organization in Chain of Memories. His weapon was a Scythe but he was later killed by Sora at the end of Chain of Memories.
Organization Number XII, Larxene was close friends with Marluxia and Zexion and planned on overthrowing Xemnas and taking the Organization for themselves. Larxene's weapons are called Kunai's, she is now deceased after been killed by Sora.
Organization Member XIII, Roxas is the last and latest recruit to Organization XIII, he is Sora's Nobody so he can therefore dual wield the Keyblades. He left the Organization to find out about Sora, but then got taken to Twilight Town and had his memory erased by Riku.

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