Naminé
The Nobody form of Kairi wields the power to alter memories, a super power based around playing with people’s emotions. Naminé was made after Sora sacrifices himself by purposefully impaling himself on Ansem’s Keyblade Replica. This act fortunately returned Kairi’s heart to her. Naminé, created by Kairi’s heart and Sora’s body and soul, does not retain any of Kairi’s memories, which makes her an enigma. The nature of her birth technically makes her a Nobody...and yet she is not just a Nobody form. Because of this, Kairi and Naminé never feel complete without one another. Similarly, she was created by major pieces of Sora as well, explaining why she can play with Sora’s memories so easily. Also, because she can control his memories, anyone who he remembers, be it friends or enemies, can be controlled and betrayed by their own memories as well. This personality trait worked against her however, ensuring that she could never leave the Realm of Light.
Riku Replica
This carbon copy of the real Riku was created by Riku’s battle data, taken from him when Vexen of the Organization tricked Riku into doing battle with him. In the beginning, the fake’s purpose was to tempt Riku. The goal was to play to Riku’s personal faults so that he would mess up and become weak again, making it easier for Riku to reach inward for the power of darkness. Vexen later changes the replica’s directives—this time to control Sora with the help of Naminé, and becoming Marluxia’s puppet. The Organization’s need for a Keyblade Wielder is great, and would be invaluable when taking over the Organization for themselves. The imitation Riku becomes distressed when he realizes that his memories are not even his own, and that everything about him has been borrowed from someone else—even his heart. The fake Riku becomes half crazed, and then runs off to look for a heart of his own.
Vexen
The scholar and scientist of the Organization, and highest ranking Organization member of Castle Oblivion, achieving the rank of six. Vexen was one of the founding members of the Organization, along with Lexaeus and Zexion. Vexen planned to overthrow the Organization by helping Marluxia control Sora and do the hard work for him and the rest of his conspirators. Genius can often lead to insanity, and Vexen had become quite the sadist of the group, creating a replica of Riku and mercilessly controlling, using, and ultimately throwing away his creation without any regard. In battle, he was a coward, using a shield to constantly try and hide from a real fight, while simultaneously taking pot shots with his Ice magic—the element that he fully controls.
Lexaeus
Known as the Silent Hero, Lexaeus is fifth in rank, as well as one of the founding members of the Organization. He controls the element of Earth, and with it creates some of the most devastatingly powerful attacks. He wields a gigantic axe sword, Skysplitter, and utilizes his tank-like strength to beat foes into the ground...literally. Lexaeus appears during Riku’s Reverse/Rebirth story and is partners with Zexion, who both plan to control Riku by turning him back to darkness.
Zexion
Another founding member of the Organization, Zexion is one of the antagonists in the Riku storyline. He is spying on Marluxia with Lexaeus and Vexen, as an internal struggle exists between the veteran and newer members of the Organization. Zexion is a schemer and does not battle often because of his highly powerful and intellectual brain. Zexion also has a power to sense others’ powers from long distances. While he does not use a weapon per se, he instead uses a book called the Lexicon. He can also manipulate what people see, thus creating several false versions of himself to confuse others when he does battle.
Larxene
The only female member of the Organization, and by far the most sadistic of the members. Larxene wields electrified throwing knives that appear beneath her sleeves. She uses them furiously, slashing at her enemy with a frenzy of quick attacks. Larxene uses high-powered lightning magic, which she controls with ease. She is quick, powerful, manipulative, and ultimately merciless. She is one of the members stationed in Castle Oblivion and is in a power struggle against the veteran members. She is allied with Marluxia, although she briefly spends time with Naminé, only to torment her for fun, while sometimes mixing it up with a little abuse.
Axel
While Axel is a powerful member of the Organization, as well as a cunning fighter and tactician, he is not trusted by his fellow members, or Sora and the gang for that matter. Axel plays by his own agenda, only stopping to help others if it works into his manipulations. Axel seems to have his own secret orders from higher up the chain of command, although nobody has a clue what his plans are because of Axel’s silent and patient personality. Axel is a bit of a pyromaniac, and fittingly controls Fire, along with two identical chakrams. By lighting them ablaze, his weapons’ hitting power becomes increased dramatically, allowing Axel to attack with intense ferocity.
Marluxia
This pink loving Organization member is the leader of the younger group. Along with Larxene, he intends to overthrow the older members and usurp the Organization by force, along with Sora and his powerful Keyblade. Marluxia wields a gigantic scythe and attacks with the power of...roses? Anyway, Marluxia becomes the main antagonist and final boss battle in Sora’s Story. He does not trust Axel, and understands that Axel is there to find out his plans to use Sora as his puppet, along with Naminé’s powers, and take control of the Organization.
Ansem
The Seeker of Darkness is Xehanort’s Heartless and once the master over Riku, his very skilled apprentice in the dark ways. He also closely resembles a younger Master Xehanort, which seems odd. Ansem was a bit...strange in his methods, and at one point willingly removed his own heart before completely accepting and letting in the darkness. Ansem was the main antagonist in the first Kingdom Hearts, and again in Riku’s Reverse/Rebirth storyline. He continues to relentlessly convince Riku to become one with him again.
DiZ
The elderly gentleman is known to some as DiZ, while he is also known as Ansem the Wise to others. Ansem the Wise was a researcher and spent long periods of time learning about the darkness and how to protect the ones he cares about from it. Even though Ansem the Wise wanted to learn about Heartless and the darkness, he grew fearful that his work would disrupt the natural order of light and dark by possibly destroying his entire world. He discovered that the darkness can only exist if the Light does too. His once trusted apprentice Xehanort, with an uncanny similarity to Dark Ansem, betrayed Ansem the Wise and stole his life’s work. Ansem the Wise, bent and twisted with vengeance, traveled the world as DiZ, until he came across a boy named Riku. During this time, DiZ decided to watch Riku’s actions from afar, choosing to only speak to him in the guise of Dark Ansem. After DiZ witnessed Riku sacrifice himself for someone he loved DiZ, or Ansem the Wise, grew a change of heart.