Aldra Vance is a prominent antagonist in the Queen's Blade anime series. She is the reigning queen and organizer of the Queen's Blade tournament, using her demonic powers and manipulative tactics to maintain control. Driven by a tragic past and a desire to find her long-lost sister, Aldra is a complex character with a mix of ruthless ambition and vulnerability. Her demonic heritage grants her formidable abilities, making her a significant obstacle for the series’ protagonists.