Black Lotus, known as Kuroyukihime in the real world, is a major character in the anime series Accel World. She is the leader of the Nega Nebulus legion in the virtual world of Brain Burst and is revered for her intelligence, elegance, and formidable combat skills. As the mysterious 'Black King,' Kuroyukihime plays a crucial role in guiding the protagonist, Haruyuki, helping him grow stronger and uncover secrets behind the Accelerated World.