The following information is the way Marluxia interacts with Axel in the video game version of Kingdom Hearts Chain of Memories. Different games give off different information with this relationship. To view Marluxia's relationship with Axel in other games, try each individual section in the main navigation above.

Marluxia, working with Axel and Larxene, plots to overthrow the Organization. They formulate a plan to use a young girl named Namine, who has a mysterious power over memory, to deceive Sora into thinking he had sworn to protect her, and then have her use Sora to help them defeat the senior Organization members. This plot stems from a rivalry between some of the younger Organization members and the original six core members.

Marluxia, Axel, Larxene, and Vexene all do their part to feed Sora with information and lure him further into the castle. Each of them fight him on their own, although none of them use their full strength and throw the fights.

Axel destroys Vexen on Marluxia's orders, making Vexen the first Organization member to be eliminated. Axel's assassination of Vexen allows him to gain the full trust of Marluxia and Larxene. As Sora nears the top floors of the castle, Axel is left alone with Namine to keep watch over her. Instead of keeping an eye on her, Axel allows her to escape, freeing her from Marluxia's control and ending her continued restructuring of Sora's memories, effectively ruining the plot to manipulate Sora into fighting the Organization. This prompts Larxene to attack Sora shortly after he defeats the Riku Replica for the final time, but she is killed in the struggle, leaving only Marluxia to carry out the plot.

Axel then confronts Marluxia, who is disgusted with Axel for betraying him, to which Axel replies that Marluxia is in fact, a traitor to the Organization, and that Larxene paid the price for her own disloyalty. He then threatens to kill Marluxia, but Marluxia seems unfazed by this, stating simply, "You can try". The two then engage in battle, with Marluxia displaying an eerie speed. While they both attack one another powerfully, neither takes any actual damage and appear to be equally matched.

Marluxia makes Namine appear in front of him, apparently as a shield to prevent Axel from attacking him further, but Axel laughs it off, saying he's willing to go through Namine to get to Marluxia. Marluxia, however, tells Sora that Axel was willing to hurt her and vanishes with a laugh, leaving Sora and Axel alone. Axel sneers at Sora for having become Marluxia's puppet after all, but Sora resolves to eliminate Marluxia right after he finishes Axel. The two fight, and Sora comes out the victor, but Axel escapes death and vanishes.

"I see...a double agent. You've been investigating our conspiracy from the start."

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