Lexaeus

Lexaeus, the Silent Hero (静かなる豪傑, Shizuka-naru Gōketsu?), is the Nobody of Aeleus and is Rank V within Organization XIII. He wields control over earth and uses his massive Skysplitter Axe Sword to create earthquakes and brutally slam opponents.

Lexaeus appears in Kingdom Hearts: Chain of Memories during Riku's storyline, working with Zexion and Vexen to try and manipulate Riku into serving them. In contrast to his fighting style and physique, he is a disciplined schemer who often tries to keep people such as Vexen in line. Lexaeus appears in Kingdom Hearts 358/2 Days as a playable character in Mission Mode. Tetsuya Nomura said that Lexaeus "has slow movement, but has very high attack power."

Story
Kingdom Hearts Birth by Sleep Main article: Aeleus

Kingdom Hearts 358/2 Days
Lexaeus appears once again in Kingdom Hearts 358/2 Days, this time with a much smaller role, appearing only in the beginning tutorials. Present when Xion joined the Organization, the Silent Hero trained Roxas in Twilight Town before being sent away to Castle Oblivion. While tutoring the Keyblade wielder, it was this Nobody's responsibility to teach Roxas how to utilize the Limit Break and survive battle with low HP. He strikes Roxas harshly in the face before the training session to put him on his "last legs". Roxas then had to battle a Mega-Shadow and correctly execute Event Horizon, his Limit, all the while at low HP.

Kingdom Hearts: Chain of Memories
Organization XIII first appears in the series during the events of Kingdom Hearts: Chain of Memories in Riku's storyline. Much of the Organization members' activities centers around the rivalry and strife within the Organization itself. Lexaeus is heavily involved in this feud, which originates from spite between senior members of the Organization and younger members like Marluxia and Larxene.

When Larxene and Marluxia begin to show signs of dissent, Zexion and Lexaeus begin monitoring the castle and their activities. Also active in the castle are Axel and Vexen, two other members of the Organization. Axel is too unpredictable to trust, but Lexaeus and Zexion enlist Vexen's help in spying on Marluxia. After learning that Marluxia plans to make use of Sora's power by deceiving him into feeling loyalty to Naminé, they decide to make similar use of Riku.

Vexen tries to make use of Riku's power by gathering data on him and creating a replica, but his experiments are interrupted. Though he succeeds in creating the replica, he is killed by Axel on Marluxia's orders before he can achieve total control over it, and the replica becomes independent, searching for a heart.

With Vexen gone and the replica useless, Lexaeus takes matters into his own hands, and the Nobody appears to Riku shortly before Sora confronts Axel and Marluxia at the top floor of Castle Oblivion. He tries to sway the former puppet of "Ansem" to give in to the darkness inside him and use his full dark powers. Riku refuses to cooperate, and Lexaeus attacks him, hoping to destroy him if he can not be manipulated. What happens next changes between versions. In the original he uses the last of his strength to attempt to swallow Riku in darkness, resulting in his own death. In the updated version, though the battle is close, Lexaeus manages to knock Riku unconscious. However, Riku's defeat allows Ansem, Seeker of Darkness to take control and he vanquishes an unsuspecting Lexaeus. It is in this moment that Lexaeus realizes whom he was fighting and apologizes to Zexion, stating this was a fight he shouldn't have started.

Secret Reports
Day 25: Hollow Ties Author: Lexaeus

''Pressing Zexion for answers would be a waste of time. I know that, but this dearth of information is hard to accept. What's happening on the upper levels? What ought we be doing down here? They hug their truths close and leave the rest of us to speculate. Zexion talks of the bond we share as an Organization, but how could such a thing exist? Still, he remains the only one I can trust.''