Lexaeus

Lexaeus is the most undeveloped member of Organization XIII: that is, not much is known about him. He is 29 and stands at 6'9 tall. What is known, however, is that he is intelligent, cold and laconic, only speaking when he finds it necessary. He is fearless and assured of his power, as he patiently waited for Riku on the upper floor of the Castle’s basement, confident enough to confront him alone and head on with no trickery or subterfuge.

His taciturn nature is shattered in battle as he growls, roars, and howls like an animal when unleashing his true strength.

He's probably the most physically powerful member of the Organization. He displays incredible strength; enough to bodily throw both Sora and Riku as rag dolls. This is further shown in one scene in the novel where Axel begins trying to lift Lexaeus's tomahawk to tease him. When this happens, however, Axel (who is a fairly strong member) struggles to lift it up with both arms and remarks that it "weighs a ton" before Lexaeus effortlessly lifts it up with one arm. Another example of this is after Riku's battle with Lexaeus; even after taking such a beating, he was able to send Riku flying all the way to the ceiling of the room. On the other hand, he appears to be somewhat distrustful of the other members of Organization XIII, and is willing to step in to silence fights between the others.

It's also known that he's incredibly loyal to Zexion to the point that he can even be called Zexion's henchman due to Zexion's role as the mastermind whom decided to use Riku to counter Marluxia. This is demonstrated as he readily obeys Zexion's orders and before he dies he remarks, "Forgive me... Zexion".

He may also be considered as being friends with Zexion, as shown when Vexen and Zexion are arguing. On this occasion, Lexaeus quickly takes Zexion's side and criticizes Vexen's attitude, displeasing the other Nobody. They are also seen together many times; almost all of Lexaeus's appearances in Kingdom Hearts: Chain of Memories are with Zexion, furthering this implication. Also, in the Secret Reports, he stated that Zexion is the only member in Castle Oblivion that he can trust.

Lexaeus is easily the largest member of Organization XIII in terms of broadness, and his black cloak is similar to that of Vexen, with sleeves that are both wider and longer than average. He also wears the standard black boots and gloves worn by the rest of the Organization. Lexaeus has very angular and strong features, with a square chin, straight nose, and sharp cheekbones. He has blue eyes and somewhat small eyebrows. His hair is ginger and slicked back into messy spikes.