Story

Not much information is availible about Zexion/Ienzo at the moment, but i'll write as much as i can. xP

Zexions story begins with Ienzo. **Warning, spoilers**

Ienzo was Ansem the wise’s young lab assistant. He encouraged Ansem to expand his research on the heartless. Unfortunately Ienzo lost his heart while researching, thus creating Zexion, his nobody.

Zexion first appears alone in a blue room. Lexaeus and Vexen soon arrive. Zexion had called them there to tell them that a new scent had appeared in the castle oblivion. He wasn’t sure whom the scent was yet, but it smelled “exactly simlar” to the organization XIII’s leader Xemnas aka “The Superior”.

Zexion later meets with Vexen in another blue room to tell him that the scent was none other than Riku. Vexen explains that Riku came to the castle because him and Sora, whom is also in the castle are drawn to eachother. Zexion and Vexen plan to use Riku, like the way Marluxia plans to use Sora.

Lexaeus approaches Zexion in another room. Zexion tells Lexaeus that Vexen had left to create his Riku replica from Riku’s data. They talk about how Naminè is changing Sora’s memory’s as they speak.

Lexaeus appears infront of Zexion. He tells him that Vexen had been eliminated. Zexion already knew this seeing as he can tell when scents are gone. He also knew that Axel had been the one to kill him. They deside that is Marluxia will hold onto Sora, the light then they will hold onto Riku, the dark.

Zexion now stands alone in an empty room. Lexaeus had been eliminated by Riku. Axel walks into the room. Axel informs Zexion that Larxene had been eliminated aswell. They believe that Sora would destroy Marluxia, and then they wouldn’t need riku anymore. Zexion decides to dispose of him.

Zexion appears in front of Riku just after Sora finished Marluxia off. Zexion informs him that Sora is in the castle and asks him if he wanted to see him.. and if he could face him. Zexion explains to Riku, that Ansems shadow still resides in his heart and that Sora is the one destand to destroy beings of dark, such as him. He tells Riku to find it out for himself and gives him a card that would take him to destiny islands, his home.

Zexion appears behind Riku. Zexion tells him that it had been his fault the islands had been destroyed, his fault that he lost his friends, and that many hearts had been lost to the darkness because of what he did. Zexion tells him he was just a darkling after all, a being of darkness. Riku attacks Zexion, and Zexion leaves.

Zexion appears in a blue room, kneeling on the floor weakly. He wondered what Riku was exactly, no one had ever worn the darkness the way Riku had. Axel and the Riku replica appear in the room. Zexion stands up. Seeing Riku, Zexion yells “Waaah! Riku?! “ but the replica says nothing. Zexion realize’s that it is just the replica. Zexion figured that Axel was going to use the replica to defeat the real Riku. Axel tells the replica that if he gained power that the real Riku had, he wouldn’t be just a copy anymore, he would be his own person. Axel holds out his hand as if offering Zexion to the replica. He says that Zexion would be a good place to start. Zexion is shocked. He asked Axel if he had lost his mind, but Axel said he’d rather observe Riku and Sora, instead of saving Zexion. The replica moves closer to Zexion for attack. Zexion says “No, Stop!” and the screen fades right before you see the replica attack. You hear a sword slashing sound, and that’s the end of Zexion. ;__;

Though new info suggests that Zexion may infact be alive.. to some extent. Seeing as you can fight him in Kingdom Hearts II: final mix. :) <3 I'll try to keep this info updated.