The following information is the way Marluxia interacts with Roxas in the video game version of Kingdom Hearts 358/2 Days. Different games give off different information with this relationship. To view Marluxia's relationship with Roxas in other games, try each individual section in the main navigation above.

Like other members of the Organization, Marluxia aids Roxas in at least one mission. He is polite to Roxas in their missions. On the first, he teaches Roxas how to collect Hearts and explains to him about Heartless. He explains the differences between Pureblood Heartless and Emblem Heartless and to only attack Emblem Heartless to release Hearts. He also explains to Roxas that after he releases hearts, they form Kingdom Hearts, and that Roxas is the first one to accomplish this.

This also shows his greed over the Keyblade. On the next, he helps Roxas fight some Dire Plants by The Old Mansion and a Zip Slasher in Twilight Town. Later, he is assigned to Castle Oblivion with the other members.

In the Secret Reports, it is revealed that Xemnas knew about Marluxia's plans to overthrow the Organization. That is why he sent them and the other "suspicious" members to Castle Oblivion, along with Axel who was given orders to eliminate any of the members that planned to overthrow the Organization, although Saix and Axel used those orders for their own ends.

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