Marluxia (マールーシャ, Mārūsha?) is lord of Castle Oblivion and the main antagonist of Sora's story in Kingdom Hearts: Chain of Memories. Also known as the "Graceful Assassin" (優雅なる凶刃, Yūga-naru Kyōjin?, lit. "Graceful Assassin's Blade"), he uses a scythe called Graceful Dahlia (優美なるダリア, Yūbinaru Daria?) and has control over rose petals to attack.[7] Tatsuya Kando provided simple battle expressions in the Japanese and English releases of Chain of Memories.[23] Shūichi Ikeda took over voice acting for the Japanese releases of Re:Chain of Memories and 358/2 Days. Keith Ferguson provided the voice in the English releases.[13][25]

Marluxia makes a minor appearance in 358/2 Days, training Roxas before he leaves for Castle Oblivion. In Chain of Memories, Marluxia lures Sora to Castle Oblivion so Naminé could manipulate Sora's memories as part of his plan to take over the Organization. He gives Sora a set of world cards that allows Sora to proceed through the castle. Marluxia assigns Axel to eliminate Vexen to prevent him from revealing the conspiracy to Sora. After kidnapping Naminé in the aftermath of Larxene's death, Marluxia is later confronted by Axel, who attempts to kill Marluxia for conspiring against the Organization. However, Marluxia uses Naminé to have Sora fight Axel for him. After Axel's defeat, Marluxia orders Naminé to erase Sora's memories so he can rebuild Sora into his pawn. She refuses and Marluxia threatens to kill her.[49] Marluxia engages Sora, but Sora discovers he is fighting an illusion. Sora later finds the real Marluxia and defeats him, who fades into darkness.