A tall, elegant Nobody with feminine features, Marluxia wears the basic Organization uniform of a black cloak, black boots, and black gloves. His hair is shoulder-length and rose pink with ruffles, though in the Gameboy version of Kingdom Hearts: Chain of Memories this color was more muted, appearing closer to light brown. Marluxia's eyes are blue and his lips are pale pink.
Personality
Marluxia is quite deceptive in 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 also takes great pride in his appearance. This is evident by the sakura petals that he often has surrounding him. 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 Saïx, 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.
Abilities
Main article: Marluxia (Boss)
Main article: Marluxia (Second Form)
Main article: Marluxia (Third Form)
Marluxia fights using the attribute of Flower and wields a large, rose pink and dark green scythe. The petals he commands have the appearance of cherry blossoms in the Game Boy Advance release of Kingdom Hearts: Chain of Memories but have been changed to resemble rose petals in his console game appearances. Marluxia has two forms in the original Kingdom Hearts: Chain of Memories, and three in the Kingdom Hearts Re:Chain of Memories remake. While in basic nobody form, he can attack with his scythe normally, or use it to slash at an enemy from across a distance using energy waves.
Despite his arrogant nature, Marluxia has proven to be quite powerful. With his command of flowers, Marluxia can create a clone made of petals, send a flurry of blossoms at his opponent, and in Kingdom Hearts Re:Chain of Memories, Marluxia uses a sleight in which he creates a powerful shockwave by hitting the ground with his scythe. Like the other Organization members from Kingdom Hearts: Chain of Memories, Marluxia moves by levitating. In the remake, he can also teleport freely. This is also the only form which he is constrained to the use of an actual deck.
In his first final form, Marluxia makes use of his mechsuit-like Nobody to slash at Sora with its scythe arms, or charge him and cause massive damage upon impact. He can also summon three petals to fire pink rays and fire blasts of energy from the bottom of the contraption. In the remake, the Nobody is also capable of harnessing darkness with which it can shroud the whole field.
Marluxia's additional final form in the PlayStation 2 remake brings Marluxia and Sora into combat upon a larger version of Marluxia's phantom mech floating in a starry-night environment surrounded by circulating rings. A large angelic Nobody stands behind him wielding a gigantic version of Marluxia's Graceful Dahlia. Marluxia is held immobile during this fight by Nobody thorns and is, therefore, unable to dodge most attacks.
From his stationary position, Marluxia fights mainly by commanding the Nobody, who can create shockwaves, shoot a sweeping laser, blow gusts of wind that prevent Sora from moving forward, and create a whirlwind that scatters all of Sora's cards, including his reload bar. Sora must then pick up the cards in order to reclaim them, including the reload bar. Marluxia's most notable sleight however, is that in which he shoots Nobody thorns that triggers a countdown timer similar to the recurring Final Fantasy spell "Doom", in which, if the counter reaches zero, the fight is instantly lost. He can also trigger the one rotating ring around the battlefield, causing it to fire lasers from all directions in addition to reusing the ray-shooting rose petals.
In Kingdom Hearts II Final Mix, Marluxia returns in an optional battle with new tactics. He begins the battle by whispering in Sora's ear, which causes a countdown timer to appear above Sora's head based on his current level, similar to the hit point condition of the Titan Cup, and then spends most of the battle attacking Sora relentlessly with his scythe, with each hit depleting the timer by one, though causing no additional damage.
If the timer reaches zero, Sora loses the battle, but the timer can be increased by using the Reaction Command "Rob Count", in which Sora grabs Marluxia's scythe, knocks him into the air and hurls the scythe at him, adding thirteen points to the counter. Marluxia also can conjure black circles which cover most of the floor and deal damage to Sora's HP, but leave the death timer unaffected. Marluxia also wheels around the floor swinging his scythe, and can hover above Sora attacking him with his scythe while making pillars sprout up from the ground and deal damage to Sora.
The Kingdom Hearts: Chain of Memories manga shows Marluxia using somewhat violent plant-based powers; he uses thorny vines to restrain Naminé in a manner similar to crucifixion, and summons a Venus flytrap that captures Naminé, Donald, and Goofy and nearly devours them.
In the original Kingdom Hearts Chain of Memories, the real Marluxia is only fought once, unlike most of the main antagonists like Ansem and Xemnas, who must be fought many times before they finally die.
Weapon
True to his title, the Graceful Assassin, Marluxia wields a large, elegant looking Scythe called the Graceful Dahlia in battle. The handle of the Scythe is a pastel green color, and the blade is a rose pink. This evokes an appearance of a plucked flower. The connection between them is yellow and resembles pieces of the Organization logo. Marluxia attacks with wide slashes and spins. He can also turn himself and his Scythe into a lethal pinwheel, and flies around the battlefield, causing heavy damage to anyone who cannot dodge out of the way. The names of his scythes always start with a descriptive term and follow up with the name of a flower, except for Stirring Ladle. He can use it defensively as well, twirling it around in a circle in order to block enemies' attacks