Marluxia has a deceptive nature. He makes an attempt to rebel against the Organization by using Sora as a puppet to accomplish his goals. Personality wise, he is often portrayed as very arrogant and vain. For example, when Axel confronted Marluxia regarding his betrayal to the Organization, he only taunts Axel and leaves Sora to fight the latter. Like Xemnas, Marluxia has a habit of being overly dramatic and giving long speeches. He takes great pride in his appearance. He also flourishes his weapon after striking with it, occasionally leaving himself open, fitting his title in the Organization.

During battle, he uses unique tactics like a death counter to represent his devious personality. Also, it seems that by his tone of voice, which is dull and monotone, that Marluxia doesn't pretend to have emotions, like Xemnas or Saix, and sticks to his true emotionless nature. However, he does smirk and laugh at some points.

Most importantly though, Marluxia seems to have an obsession with his superiority over the other Organization members. As the lord of Castle Oblivion, Marluxia has the ability to keep many members of the Organization under his own judgment. He even manipulates Vexen into fighting Sora by using Vexen's fear of Xemnas against him. Even though most of Marluxia's personality traits are negative, he does have a few positive aspects.

Some of these include his devotion and persistence to succeed in his goals, continuing his plans to overthrow the Organization even after Axel's betrayal and the death of Larxene. He's a very adamant member of Organization XIII. Marluxia believes that he deserves more respect than he's given. All in all, Marluxia is a very egotistical, manipulative member of the Organization, who would stop at nothing to overthrow the Organization and become superior.

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