Xion

Xion is the fourteenth member of Organization XIII, first appearing in the game Kingdom Hearts 358/2 Days. She is not actually a Nobody, but an incomplete replica of Soracreated by Xemnas made from Sora's leaked memories. Her face was based off of Sora's strongest memory, Kairi, but as Naminé pieced together Sora's memories, she began to physically look like Sora.

The plan was for Xion to eventually become a complete Sora replica, due to the fact that Xemnas was unsure if he could rely on the actual Sora to gather him enough hearts for Kingdom Hearts. Eventually she would have had to absorb Roxas to become whole, and if that were to happen, the original Sora would never awaken. Eventually she is absorbed by Roxas instead, thus giving him the ability to duel-wield.

Personality
Xion is shown to be a kind and good friend,but she gets depressed after finding what she really is. To that extent,she eventually goes insane and wishes to become whole,and willingly tries to kill/absorb Roxas to make it happen.

Fighting Style
Xions fighting style is exactly like Roxasand Sora's battle style

Xion