Saïx turns around and speaks. "How pathetic of a puppet you are!" *strikes a nerve* "Why our leader make such a worthless being such as yourself I will never know." *strikes a second nerve* "In fact I think that your entire existence is..."
"That's enough!" You scream in your normal voice, but not from Xion's body.
"Who said that?!" Saïx demands as he readies his claymore. Saïx looks at Xion, and then at the strange liquid beside her. "What is that?" He asks, but suddenly a being begins to rise from the liquid (I.E. you).
"You have to be the biggest jerk I've ever seen!" You yell angrily via Xion.
"And now..." Your original self begins.
"It time for you to pay!" Both of your bodies say in unison.
You summon up a Keyblade via Xion and copy use your ability to copy any abilities from girl(s) you've possessed to copy Xion's abilities to summon a Keyblade and to use spells, then you summon your own Keyblade. You make your normal body your main body.
"No! This can't be possible!" Saïx exclaims, fear seeming to sink into his mind. "But I will not lose here! Not to any puppet or monstrosity!" Saïx's eyes glow golden, meaning that he has gone into his berserker state, which always made you worry in the game, but this time you have help.
Both of your bodies charge at Saïx and your weapons collide with his, creating a huge explosion which shakes the very foundation of the Castle That Never Was. The smoke clears and all three of you are sent flying though both of your bodies and Saïx manage to fight a bit before landing. You manage to break his berserker state, which has left him open to attack. You shoot out a few fire spells, then dual uppercut him, which makes him land with a hard thud. As you land, you notice a few other faces I.E. the other organization members such as Axel, Roxas, Xigbar, along with the other remaining members, besides Xion, of course.
Axel and Roxas charge at you, but you block both of their strikes and knock them off balance with a drop kick while Knocking Roxas's Keyblade out of his hand.
“I have no quarrel with you, or any of the others of this Organization. I only wish to destroy Saïx!” You explain showing a small tone of anger and annoyance. Nobody notices a liquid part of yourself land on the ground and head towards Roxas's Keyblade. You walk towards Saïx, who has managed to get back up, and also managed to recover a small amount. The other members look at their leader Xemnas to see what he wants them to do. Xemnas smiles a small amount and chuckles a little bit before speaking.
“Well, if his quarrel is only with Saïx, then let him. I don’t want anyone to interfere, nor do I want anyone to help.” He commands before using a Cura spell on you and Saïx, returning you both back to full health.
“Thank you Xemnas” You say, readying your Keyblade as you/Xion backs away. Saïx looks betrayed.
"But why-" Saïx begins, before Xemnas glares at him.
"Do you think I am ignorant? I know that you gave Axel orders to eliminate everyone else at Castle Oblivion, I just haven't been able to prove it, so I have no problem letting this boy fight you. The fact that he also has a Keyblade helps as well."
"Now, if there are no more problems, let's do this!" You say, ready to strike.
“I will not lose to you, you fool!” Saïx states, pointing his weapon at you before the fight begins anew.
The both of you run at each other with the intent of a death blow, but your weapons collide, forming another explosion, but this time you aren’t sent flying, but instead land a few feet away. You fire off a few spells, which then chase after Saïx, but he blocks them with his claymore, which leaves him open for a frontal assault. You seemingly teleport in front of Saïx to everyone except Xemnas’s surprise, and then you knock Saïx's claymore from his hand, grab it, and then bring it down on him. Before he can recover, you stab him through his non-existent heart and run a Fire spell through it, burning him to death. You/Xion walks over to you and gives you a peck on the cheek, you notice how odd it feels to receive the kiss and give it at the same time since you feel everything from both bodies. You also notice Roxas looking jealous at the fact that you got kissed by Xion instead of him getting kissed by her. Xigbar give a cat-call at it.
"Way to go, dude!" Xigbar says with a grin. Roxas has picked up what he thinks is his Keyblade, but it is really a copy of you, imitating his Keyblade as you have brought it back to your world. You and you/Xion go back to your world, and you pick up Roxas's Keyblade, claiming it as your own since he doesn't exist in your world. Then you have the copy of yourself return to your world and combine with you. You and you/Xion fall asleep on your bed.
You wake up about an hour later, and see Xion's body right beside you, still asleep. You run your hand through her hair, and then begin to change personality, making her your puppet who likes to be played with by you, and only you with the exception of people you allow to play with her, then you let her regain control, at least for the time being. Then you proceed to get up and begin to think of what to do next...