Aldra Prasasmita is a central character in the anime series 'Queen's Blade'. She is known as the half-demon ruler who possesses immense power and is the reigning champion of the Queen's Blade tournament. Aldra's character is complex, marked by her tragic past and her struggle with her demonic heritage, which she attempts to suppress. Her role in the series is pivotal as she serves as both an antagonist and a sympathetic figure, driven by a desire to reunite with her lost sister, which adds depth to her character and the series' storyline.