I think she's an Angsty Sue and a Canon Sue. Sorry if it's kinda messy....
[URL="http://www.getacd.org/listen_0GRexjl8UcA/kingdom_hearts_358_2_days_xion_final_boss_theme_music"]Kingdom Hearts 358/2 Days Xion Final Boss Theme Music - Listen - GetaCD.org / 0GRexjl8UcA[/URL]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]xion's final battle theme[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]you fight her 4 times[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]this one's the 4th[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]sounds cool, huh?[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]and it's ripped off[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]1:37 - 1: 42 is copied from Friends in My Heart[/COLOR][/SIZE][/FONT]
[SIZE=3][FONT=Times New Roman][COLOR=#000000]1:16 - 1:22 is copied from Kairi's theme[/COLOR][/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman][COLOR=#000000]she has her own theme and her own boss theme[/COLOR][/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman][COLOR=#000000]and you fight her four times [/COLOR][/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman][COLOR=#000000]in four different armors[/COLOR][/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman][COLOR=#000000]and she says epic lines before you fight such as:[/COLOR][/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman][COLOR=#000000]"This puppet will have to play her part" [/COLOR][/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman][COLOR=#000000]and[/COLOR][/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman][COLOR=#000000]"You've filled me with so much memories... given me so much that I feel like I'm about to overflow. Look at me, Roxas. Who do you see?"[/COLOR][/FONT][/SIZE]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]and she dies a slow crystalized epic death with her theme playing in the background[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]WARNING! MAJOR SPOILERS!!![/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]http://www.youtube.com/watch?v=1fiCG4ZwJ5IWatch With Me[/COLOR][/SIZE][/FONT]
[SIZE=3][FONT=Times New Roman][COLOR=#000000]oh! And don't forget her slow death speech[/COLOR][/FONT][/SIZE]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]wait... I meant AFTER death speech[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]and it's telling Roxas not to worry[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]"Roxas, don't be sad. I came from you and Sora. I am you... the same way that I am Sora. You'll forget me, but the memories themselves will never go away. Memories of you and me will always be together... forever, inside him."[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]So she pops out of nowhere[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]"Good tidings, friends. Today is a momentous day. I am pleased to announce that a new comrade has been chosen to wear the coat."[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][COLOR=#000000][SIZE=3]-[/SIZE] [SIZE=3]Xemnas[/SIZE][/COLOR][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]gets people to hate her[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]"Did it break again?"[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]-Saix[/COLOR][/SIZE][/FONT]
[SIZE=3][FONT=Times New Roman][COLOR=#000000]Faints into Roxas/ Axel's arms or falls asleep like Roxas/Sora did[/COLOR][/FONT][/SIZE]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]"Is poppet(Xion) doing the Rip Van Winkle thing?"[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][COLOR=#000000][SIZE=3]-[/SIZE] [SIZE=3]Demyx[/SIZE][/COLOR][/FONT]
[SIZE=3][FONT=Times New Roman][COLOR=#000000]gets Axel to care deeply about her[/COLOR][/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman][COLOR=#000000]"What's your problem!? You both...think you can do whatever you want. Well, I'm sick of it. Go on, you just keep running! But I'll always be there to bring you back!"[/COLOR][/FONT][/SIZE]
[COLOR=#000000][FONT=Times New Roman][SIZE=3]-[/SIZE] [SIZE=3]Axel[/SIZE][/FONT][/COLOR]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]and dies[/COLOR][/SIZE][/FONT]
[SIZE=3][COLOR=#000000][FONT=Times New Roman]and dont forget, she makes Roxas cry[/FONT][/COLOR][/SIZE]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]"Xion...." cries*[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]-Roxas[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]says her after death speech [/COLOR][/SIZE][/FONT]
[SIZE=3][COLOR=#000000][FONT=Times New Roman]fuels Roxas' actions[/FONT][/COLOR][/SIZE]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]even makes Riku and Roxas talk aout her while they're fighting[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]and makes Axel think about her[/COLOR][/SIZE][/FONT]
[SIZE=3][COLOR=#000000][FONT=Times New Roman]after she die[/FONT][/COLOR][/SIZE]
[SIZE=3][COLOR=#000000][FONT=Times New Roman]"How did this happen?"[/FONT][/COLOR][/SIZE]
[SIZE=3][COLOR=#000000][FONT=Times New Roman]- Axel[/FONT][/COLOR][/SIZE]
[SIZE=3][COLOR=#000000][FONT=Times New Roman]What does that spell?[/FONT][/COLOR][/SIZE]
[SIZE=3][COLOR=#000000][FONT=Times New Roman]MARY SUE!![/FONT][/COLOR][/SIZE]
[SIZE=3][COLOR=#000000][FONT=Times New Roman]oh, one more SPOILER(enter at your own risk) video[/FONT][/COLOR][/SIZE]
[URL="http://www.youtube.com/watch?v=1fiCG4ZwJ5I"]YouTube - Xion's Death english[/URL]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]ZOMG!!! [/COLOR][/SIZE][/FONT]
[SIZE=3][COLOR=#000000][FONT=Times New Roman]MARY SUE!!!!!!!![/FONT][/COLOR][/SIZE]
[SIZE=3][COLOR=#000000][FONT=Times New Roman]What is a Mary Sue?[/FONT][/COLOR][/SIZE]
[SIZE=3][COLOR=#000000][FONT=Times New Roman]A Mary Sue (sometimes just Sue), in literary criticism and particularly in fanfiction, is a fictional character with overly idealized and hackneyed mannerisms, lacking noteworthy flaws, and primarily functioning as wish-fulfillment fantasies for their authors or readers. Perhaps the single underlying feature of all characters described as "Mary Sues" is that they are too ostentatious for the audience's taste, or that the author seems to favor the character too highly. The author may seem to push how exceptional and wonderful the "Mary Sue" character is on his or her audience, sometimes leading the audience to dislike or even resent the character fairly quickly; such a character could be described as an "author's pet".[/FONT][/COLOR][/SIZE]
[SIZE=3][COLOR=#000000][FONT=Times New Roman]The term "Mary Sue" is taken from a character created by Paula Smith in 1973 for her parody story "A Trekkie's Tale,"[5] published in her fanzine Menagerie #2.[6] The character in question was Lieutenant Mary Sue ("the youngest Lieutenant in the fleet — only fifteen and a half years old"). Smith's story poked fun at unrealistic and adolescent wish-fantasy characters in Star Trek fan fiction. Such characters were generally original (non-canon) and female adolescents who had romantic liaisons with established canon adult characters or in some cases were the younger relatives or protégés of those characters. They also possessed unrealistic, often exotic skills beyond those that would have been expected of a character in that series or of a conventional author surrogate. "[/FONT][/COLOR][/SIZE]
[SIZE=3][COLOR=#000000][FONT=Times New Roman]The negative connotation comes from this "wish-fulfillment" implication: the "Mary Sue" is judged a poorly developed character, too perfect and lacking in realism to be interesting. Such proxy characters, critics claim, exist only because authors wish to see themselves as the "special" character in question.[/FONT][/COLOR][/SIZE]
[SIZE=3][COLOR=#000000][FONT=Times New Roman]The term is also associated with cliché such as exotic hair and eye colors, mystical or superhuman powers, exotic pets, possessions or origins or an unusually tragic past, especially when these things are glaringly out of step with the consistency of the canon. These features are commonplace in "Mary Sues", though even a character who lacks them may be labeled a "Sue" by some critics. The term is more broadly associated with characters who are exceptionally and improbably lucky. The good luck may involve romance ("Mary Sue" always gets her man); adventure ("Mary Sue" always wins a fight or knows how to solve the puzzle) and popularity (the "right people" seem to gravitate towards the character). These characters have few problems while attempting to achieve their goals. "Everything goes he[/FONT][/COLOR][/SIZE]
[SIZE=3][COLOR=#000000][FONT=Times New Roman]Kinds of sues that Xion is:[/FONT][/COLOR][/SIZE]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]"Angsty" Sue[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]This subconcept of the larger "Mary Sue" concept comes in two common variations. The first is a character who is constantly depressed and has a tragic past, frequently involving murder, child abuse, rape, or abandonment of some sort. She or he often feels guilt for something that happened in the past, even though it is usually not his or her fault, which gives him or her the ability to feel bad about something without having done anything wrong. Generally, if she or he doesn't commit romanticized suicide, then only the love or close friendship of one or more canon characters can convince her that she is not responsible for a tragic or horrific childhood or event that was obviously not of her making. Such backgrounds constitute an ill-advised attempt to gain sympathy from the [/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]mon_ongsingco: from the reader.[/COLOR][/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]The other version of the "Angsty Sue" subconcept involves a character who has a similarly tragic past, but rather than angsting about it, she or he seeks revenge. She or he is thrust into the spotlight of the story while doing so. The writer is seen as using his or her past not merely as a device to gain sympathy, but also to claim moral superiority and justification for his or her actions. As such, this type of "Angsty Sue" rarely has any guilt at all - after all, she or he hasn't done anything "wrong."[/COLOR][/SIZE][/FONT]
[SIZE=3][COLOR=#000000][FONT=Times New Roman]Canon Sue (in original source)[/FONT][/COLOR][/SIZE]
[FONT=Times New Roman][SIZE=3][COLOR=#000000]A "canon Sue" may also refer to a character whose canon portrayal itself is seen as a "Mary Sue", rather than a character who has been altered in fan fiction. Typically, this refers to a character accused of being overly idealized or having other traits traditionally associated with fan fiction "Mary Sues", such as being "special" by having a gratuitously tragic past, unrealistic skills, or a seeming inability for the character to do wrong.[/COLOR][/SIZE][/FONT]