Aldra Amon is a central character in the Queen's Blade series, serving as the main antagonist during the Queen's Blade tournament. She is the reigning queen and possesses the power to turn her opponents into stone. Aldra is a half-demon, which grants her immense strength, longevity, and the ability to summon demons. Her complex backstory reveals a tragic past that influences her actions, as she is driven by a desire to find her long-lost sister. This duality makes her a compelling and multifaceted character.