Xion

Xion is the fourteenth member of Organization XIII, first appearing in the game Kingdom Hearts 358/2 Days, in which she could be viewed as both a main protagonist and antagonist. She is not a normal Nobody and is only a nominal member of the Organization. Because of this, she does not have a throne in Where Nothing Gathers, nor does she have a title or a breed of Nobody to control. Instead, she's an imperfect Replica of Roxas created from Sora's leaked memories as a fail-safe in case both Sora and Roxas proved to be useless to Organization XIII's plans. While this enables her to use the Keyblade, Xion's existence also halts Sora's progression of regaining his memories to fully awaken while in his pod, something which Naminé, DiZ, and Riku recognize.

As Sora's memories are the basis of her being, Xion initially resembles Kairi, who was Sora's strongest memory at the time of her birth, though her physical appearance eventually changes depending on who is viewing her and who they have connections with. Roxas, Axel, and Riku (and presumably the rest of the Organization, except Xigbar, Xemnas, and Saix) see her as Xion. Roxas also sees her as Sora before their battle with each other, Xigbar sees her as Ventus, Xemnas sees her as Sora, while Saïx sees her only as a hooded puppet. As Naminé stated while talking with Riku, Xion's face was originally blank, until Sora's memories found their way into Xion and she gained an identity.

Xion's name was coined by Tomoco Kanemaki, one of Kingdom Hearts 358/2 Days's scenario writers and the writer of the Kingdom Hearts Novels. Tetsuya Nomura took a liking to it and notes that it has many meanings. Xion's name contains the Japanese words for "tide" (潮), fitting the oceanic naming theme of Kairi and Naminé, and Aster tataricus (紫苑), which, according to Japanese floriography, means "I won't forget you" or "remembrance". It is also revealed within the Secret Reports that her "original name" was "No.i", her ID as an experiment of the Replica Program. The "i" used here is in fact the imaginary number.

Xion was voted "Best New Character" in the 2009 Nintendo Power Awards.

Kingdom Hearts 358/2 Days
A week after Roxas joins Organization XIII, Xemnas introduces Xion to the other members. After looking at the other members, she smiles up at Roxas, puzzling him. As Roxas departs for his first training mission, he spots Xion shyly watching him nearby, and Saïx formally introduces her to Axel and Roxas.

On the day Axel is sent to Castle Oblivion, Xemnas entrusts Roxas with the task of looking after Xion, who quickly bonds with him. She reveals her ability to wield the Keyblade to him and looks after him when he falls into a coma for several weeks in conjunction to Sora being put to sleep to regain his memories. After discovering that Sora and Riku had slain all of the Organization members (except Axel) that were in Castle Oblivion at the time, Roxas, Axel, and Xion all begin spending more time together as per Roxas's suggestion and become fast friends, such as enjoying sea-salt ice cream together. After Xion asks Axel to be her friend, he accepts, and he stops seeing her as a hooded doll, and begins seeing her as the black-haired girl that Roxas sees.

However, a series of events begin to split the trio apart: while DiZ and Naminé oversee the restoration of the sleeping Sora's memories (moving him from Castle Oblivion to Twilight Town), Roxas begins to experience the process for himself, and begins to ponder over how he is able to wield the Keyblade and doubt the Organization's motives; Axel is reprimanded by their superiors for placing his friendship with Roxas and Xion before the Organization's goals; and Xion is thrown into disarray after a confrontation with Riku, who questions who she is and why she wields the Keyblade, causing her to become torn between staying with her friends and leaving the Organization to merge with her true self as Riku suggests.

Xion travels with Riku for several days before being captured by Axel and brought back into the Organization. However, Naminé's attempts to restore Sora's memories are soon halted when Xion starts absorbing them faster, causing Roxas to weaken as she becomes stronger, as Xemnas intended. Eventually, after being tricked into fighting Roxas by Saïx, Xion decides to accept Riku's advice and leaves the Organization.

After her departure, Xion comes into contact with Naminé in Twilight Town's Old Mansion, questioning her own existence and the fate that will soon befall Roxas. She discovers that she is not a Nobody, but an imperfect Replica of Roxas. Naminé also reveals that as a memory being, once Xion returns to Sora, everyone's memories of her will inevitably be forgotten. Furthermore, Naminé's attempts to restore Sora's memories not only affect Roxas, but Xion as well, stating why they both keep having memory relapses throughout the game. Xion accepts the facts, and decides to go back into Sora. Before she does, though, DiZ barges in with the news that an Organization member has followed her, in which Xion says she will take care of it, despite Naminé's protests, and heads out of the mansion.

It is Axel who has arrived, having finally tracked Xion down. Not only is Axel curious of Xion's motives, he is also given specific orders to capture her again, which would possibly convince Roxas to return to the Organization. Xion refuses, leaving Axel no choice but to accomplish his mission with brute force, leading to a heated battle. Having defeated Xion, Axel brings her back to The World That Never Was, but soon faints from fatigue. Xemnas then steps out from the shadows and carries the unconscious girl away to reprogram her to use the devices he had planted throughout the worlds.

Soon afterward, Roxas finds Xion at the Twilight Town train station, and after she reveals her altered, Sora-like form to him, she explains that she has been compelled by Xemnas to absorb Roxas and become a "full" Sora, which would in turn prevent the real Sora from ever waking. It is explained in her secret reports that this is somewhat of a ruse—she knows that Roxas will disappear if she continues to exist, so she plans to force Roxas to absorb her, saving himself and thwarting Xemnas's plan. She then transforms into a monstrous version of Sora using Xemnas's devices, and attacks.

During the battle, Roxas and Xion are transported to Wonderland, Halloween Town, and Agrabah, before returning to Twilight Town. In each world, Xion absorbs power from the "devices" that were placed there, which contain memories of Sora's battles in each world. After a long and grueling battle, Roxas manages to defeat her, while she regains her original appearance in his view.

When done, he doesn't seem to recall who she is, though she assures him that he'll be better off now. Cradling her in his arms, Roxas shares an emotional conversation with her, during which she explains to him that she had no regrets for meeting him or Axel, reveals the true colors of the Organization to him, and pleads with him not to let Xemnas win before dying peacefully in his arms. Saddened, Roxas suddenly remembers her name and holds Xion's hand as her body crystallizes and disintegrates into nothingness, leaving behind nothing but a single Thalassa Shell.

Though Naminé states that everyone's memories of Xion will vanish when she does, Roxas, Axel, Riku, Xemnas, and Saïx manage to retain some memories of her into the next day. By then, Roxas has returned to the World That Never Was in order to set Kingdom Hearts free, which he hopes will reunite him with Xion. However, he is being stalked by a swarm of Neoshadow Heartless, as well as a determined Riku, who has arrived to capture Roxas to finish Sora's memory restoration. Riku looks down upon the Nobody, before Roxas starts his path up the skyscraper.

Through him, Xion is able to throw the Oblivion Keyblade to Riku in order to tell him to stop Roxas before he can reach Xemnas, because she believes Roxas is not strong enough to face him yet. In turn, touching the Oblivion causes Riku to recall flashbacks of the time he spent together with Xion, putting him in shock for a moment. The flashbacks then reoccur when he reaches the ground to face the Neoshadows, but this time turn blurred and grainier as they continue, until only film static remains, most likely meaning their total withdrawal from Riku's memories.

When Roxas and Riku finish eradicating the Heartless, they turn on each other for a battle. By this time, it is a struggle for Roxas to even remember Xion's name, and all he knows about her is that he wants her back. While Roxas is able to knock Riku down first, Xion then somehow telepathically projects her words to Riku, to stop Roxas at any cost, and so he does once he removes his blindfold and transforms into Riku-Ansem and knocks Roxas unconscious.

After he passed out, Roxas hears Xion's voice telling him not to be sad. She tells him that she has become one with him and Sora and, that even though his memories of her are going to fade away, they will remain inside Sora himself.

Kingdom Hearts coded
In the Data Castle Oblivion, Data-Naminé reveals to Data-Sora and King Mickey that Xion is one of the people that, while gone, is still connected to Sora's heart.

Xion appears very briefly in the opening for Re:coded, where various clips from the series flashes by, Xion's death being one of them.

Blank Points
After Aqua speaks with Ansem the Wise about Sora, Xion is sitting atop the Twilight Town clock tower and eating sea-salt ice cream with Roxas and Axel. Then, Xion and Roxas say Sora's name while watching the sunset together.

Kingdom Hearts 3D: Dream Drop Distance
Xion appears during the opening sequence, where she points at Roxas with her Kingdom Key. The scene then changes to another scene, where Xion is seen having fun with Roxas and Axel on top of the Twilight Town clocktower. The scene changes back and Xion vanishes into fragments of light.

Xion then appears to Sora in the World That Never Was. Sora takes a grip of Naminé's wrist, but then Naminé turns into Xion. Sora then sheds a tear (most likely because of Roxas inside of him) and wonders who the girl is. Xion then pulls away from Sora and runs away from him.

Xion later appears on Destiny Islands inside Sora's heart. She is sitting on the Paopu Tree and Riku initially mistakes her to be Sora. Xion watches the sunset and asks Riku, "What do you want outta life?" Riku can then choose from three options like Sora did in the original Kingdom Hearts. Xion disappears after Riku gives her an answer.

Appearance
Xion's Organization coat is similar to the one Roxas wears, with slightly pointed shoulders and closer-fitting sleeves. She also wears the more feminine, heeled boots that Larxene wears and the basic black gloves. Physically, Xion strongly resembles Kairi in her appearance from Kingdom Hearts, having her blue eyes and virtually the same haircut, though Xion's hair is black and her bangs part on a different side. She is slightly shorter than Roxas. As a result of her being crafted from Sora's memories, Xion's appearance is somewhat unstable, as she is known to transform into Roxas (in his Black Cloak) and both Riku and Sora in their original appearances from the first game.

Her appearance is also slightly different depending on who is looking at her, and their relation to her. Most of the Organization, such as Saïx and, early on, Axel, view her as a hooded puppet, while to Xigbar, she appears identical to Ventus. Xemnas, on the other hand, sees her true form—a perfect copy of Sora. In one of his secret reports, Axel states that Xion looks like Naminé, although it is not clear if he truly saw her as Naminé at that time, or if he simply was referring to the physical similarities that Xion and Naminé share. An interesting note is that once Axel considers Xion a friend, from that point forward, he only sees her as the girl that she is instead of a hooded puppet.

Tomoco Kanemaki is responsible for Xion having black hair.

When Xion begins to absorb Sora's memories from each of the devices that was placed in Wonderland, Halloween Town, and Agrabah, she gains armor that causes her to resemble a mechanized version of Sora as he appeared in Kingdom Hearts. Her armor changes based on the amount of memories that she has taken in, though some features stay the same. Her initial armor has the form of a pink and white helmet that has spikes on the top, sides, and back. Her body armor is a black, white, and pink jacket with black and pink gloves. The bottom half of the armor consists of mainly black and gold, with golden and white shoes. If one pays attention, her silhouette matches that of Sora.

During her first form in the Bizarre Room in Wonderland, she uses a pair of green, white, and pink wings, and carries a golden and pink blade. In her second form in Halloween Town, she uses a large, long blade inspired by Halloween Town itself, and uses the Ragnarok limit. While in her Agrabah form, she appears to have four arms, as well as having additional golden shoulder pads and purple and white blades, for the Ars Arcanum attack. Finally, her final form in Twilight Town is a large, upscaled version of the original, with two pink lances in the shape of the Nobody symbol.

Personality
First arriving at Organization XIII, Xion is a shy, secluded individual. When going on a mission with Roxas, Xion begins to open up to him and later Axel. She does seem to express emotions due to her nature of existence, and is always happy to be with her friends. However, she is somewhat emotionally fragile, becoming deeply enraged with the right provocation. After finding out the origins of her existence, she also becomes deeply confused and lost. She is observant and perceptive. She has a strong sense of justice and generosity, seen in the way she willingly gave up herself to join with Sora. She resembles Kairi and Naminé in the way that she fights to protect those she has come to care for.

Xion seems to take an interest in seashells. While Roxas was in a coma when Sora was put to sleep, Xion placed a seashell on his bedside table every day he was asleep. In her nightmare on Destiny Islands, Roxas is in the dream and picks up a shell while whispering her name. After Xion was absorbed into Roxas, all that was left of her was a single seashell. This is likely a reference to how Kairi also had a liking for seashells.

Abilities
As an indirect Replica of Sora, Xion's fighting style as a playable character is very similar to his. After absorbing many of Sora's memories using the Organization XIII Devices, Xion is able to replicate Sora's Limits from Kingdom Hearts. However, Xion's movement is quite similar to Limit Form's, jumping back and stepping forward between attacks and slashing through the enemy in the finisher. Like Roxas, she thrusts with one hand and her finisher resembles the Vortex ability. Xion's Limit Break, Event Horizon, involves covering her Keyblade in an aura of Light and performing a devastating combo. Xion can also call down elegantly shaped pillars of Light to attack nearby and far away enemies. Before Xion obtains the Keyblade herself, she is limited to simply shooting magic out of her hand, none of which is Light-based.

Once she obtains her Keyblade, Xion proves adept at handling it, being able to fight with it using her right or left hand. Her boss battle depicts her using many powerful melee attacks she seemed to have inherited from Sora. She also uses Light much more often during her boss fight, such as creating spiraling circles of Light that suck in the player, leaving them vulnerable to one of Xion's aforementioned physical attacks. She can also use a Light spell similar to Ragnarok, and can envelope her weapon in Light to make her other attacks even more powerful.

Xion's Limit Break in Kingdom Hearts 358/2 Days is Event Horizon (イベントホライズン). During Event Horizon, Xion rapidly darts around the field with her Keyblade enveloped in Light, slashing away at enemies with great strength. In her Final Limit, she summons four thin pillars of light to quickly move in straight paths to ends of the field, dealing heavy damage to any enemies in their path.

Weapon
As Roxas's Replica, Xion can wield the Keyblade. She wields her weapon fairly skillfully, being able to disarm Axel. Because Xion and Roxas are both part of Sora, they can both wield his Keyblades, even at the same time. Because their weapons are the same, the Gears produce the same forms when applied to either Keyblade.

It is notable that, when Xion runs with her Keyblade, she grasps it with two hands instead of slinging it over her shoulder like Roxas does. This is identical to how Sora runs in battle with his Keyblade in Kingdom Hearts II.