Marlene Calvert is the teenage daughter of Lord Calvert, the ruler of a territory in the world of the Slayers franchise. She appears as the main antagonist in the film Slayers Gorgeous. Marlene has a strong and unusual affinity with dragons, allowing her to command them almost as if they were pets. She leads a group known as the Four Lords of Heaven, which includes herself, her mysterious advisor Geizneau, the warlord Thornfort, and the sorceress Naga the Serpent, who joins her side during the conflict. Marlene is also the wielder of a weapon she calls the Sword of Chaos, though it is later revealed to be made of wood, and she wears armor that is likewise fake.

Personality-wise, Marlene is headstrong, rebellious, and determined. Her motivations are driven by a petty dispute with her father: she wages a war against Lord Calvert solely over the amount of her weekly allowance, which she believes is unjustly low. This childish yet earnest grievance leads her to lead a legion of dragons in raids against her father’s forces. Despite her stubbornness, she is not deeply malicious; her actions are more about teenage defiance than genuine evil. Her role in the story places her as an antagonist to Lina Inverse, who is hired by Lord Calvert to stop her, and as an ally to Naga, who works for a higher bid.

Key relationships include her estranged father, Lord Calvert, with whom she ultimately reconciles after the true threat—Geizneau’s betrayal and his transformation into a giant evil dragon—is defeated. She also commands the loyalty of her dragons, though they flee at the mere mention of Lina Inverse’s name. Marlene develops over the course of the film from a spoiled, warring daughter to a figure who makes peace with her father and agrees to have humans and dragons rebuild the city together. Her notable abilities are limited to her natural command over dragons; she does not display any personal magical powers. Her combat prowess is negligible, as her sword and armor are revealed to be props, and she is easily defeated by Lina.