Lucia is one of the protagonists and playable characters of Devil May Cry 2, alongside Dante. Lucia is a quick and agile fighter, she uses two ornately crafted curved daggers[1]. Like Dante, she can also Devil Trigger transforming into a demon similar to an angel. Lucia is a member of Vie de Marli, a clan of guardians which have the blood of demons.
Lucia lures Dante to her island so that Matier, her mother, may ask him to help them to defeat Arius, an evil man who has turned their land into a demon paradise. Matier asks Dante to help Lucia to find the remaining parts of Arcana, ancient relic used to seal Argosax off this world and the artifact which Arius is so desires for. Dante accepts, and he and Lucia start their quests separately.
Much later Lucia meets Arius, and he reveals to her that she is actually a mannequin, like Secretaries, and was created by him. He says that she was a "defect" and so was about to be disposed of then Matier found her. He also tells her that a mark on her left shoulder - "X" (Chi) - is actually her real name. Then he demands that Lucia gives him Arcanas that she have already found. After she angrily rejects, he says that "the world is already warped" and that "everything that belongs to the devils will eventually revert to its original form", including Lucia, and leaves her, uncertain about her own future.
Despite this, Lucia continues her mission to find all the remaining parts of Arcana. When she gathers them all, she gives Arcana to Dante, asking him to bring them to Matier for her. After that, she leaves to finish Arius by herself, but is unsuccessful and gets captured. Later Dante comes to rescue her, and gives out all the Arcana despite Lucia's protests. After Arius and Dante fight, the sorcerer uses his hostage to pull them both out of the building. However, Dante transforms into a devil and they fly to safety. Lucia then asks him why he saved her to which he replies that "every hero has a weakness". There she also meets with Matier, who confirms that they are not tied by blood, but also says that their bounds come from history and experience, which are much deeper. Then Lucia goes after Dante.