Вексен

Vexen is the fourth member of Organization XIII. His name is an anagram of "Even" with the addition of the letter X. His element is ice, and he is armed with a shield. Vexen conducts experiments on clone creation, with Xion being the first of his creations. In Chain of Memories, he attempts to disrupt Marluxia's plans by manipulating Riku and his clone. As Vexen begins to fail, he decides to inform Sora about Marluxia's plans and the existence of Roxas, but Marluxia orders Axel to eliminate him. Vexen's destruction leads to the revival of Even in Kingdom Hearts 3D: Dream Drop Distance.