Nobody 6 ZeXion

Zexion (ゼクシオン, Zekushion^?), is a manipulator appearing in Chain of Memories. He is also known as the "Cloaked Schemer" (影歩む策士, Kage Ayumu Sakushi^?, lit. "Shadow-walking Schemer"). Zexion's original self was Ansem the Wise's youngest lab assistant, and named Ienzo (イエンツォ, Ientso^?). He convinced Ansem the Wise that they should build an underground lab for research. He is voiced by Akira Ishida in Kingdom Hearts Re:Chain of Memories. Zexion uses his power of illusion, used to mimic others' weapons, disguise himself as others, and create duplicates of himself.^[6] His unique weapon is a lexicon. Before Kingdom Hearts II Final Mix,
Zexion's weapon and powers were unknown because he had died without
fighting. Because Nomura was unsure if it would be revealed later, he
kept information about it secret. The development team also destroyed
his gravestone in the World That Never Was that would have shown his
weapon.^[3]
Zexion is one of two Organization members who appear only in Riku's story in Chain of Memories.
Zexion tracks Riku's actions until Vexen's death; Zexion and Lexaeus
then decide to use Riku to counter Marluxia's plan to use Sora. After
Marluxia is killed, Zexion sees Riku as unnecessary and attempts to
destroy Riku himself. He leads Riku into a manifestation of Destiny
Islands, Riku's home. There, Zexion tells Riku about how he threw away
his friends and his home and opened the door to darkness, thus
destroying the islands. Following Riku's battle with a large Heartless,
Zexion disguises himself as Sora and attacks Riku, telling him that
he's become a pawn of the darkness. He engulfs Riku in light, but a
vision of Kairi convinces Riku to accept darkness and light. With
newfound confidence, Riku follows Zexion's scent through the light and
causes Zexion to flee. Axel brings the Riku Replica to Zexion and
convinces the replica that he can become "real" by gaining power that
the real Riku does not have. The replica agrees, and as per Axel's
suggestion, kills Zexion