A full body shot from a slightly distant perspective, depicting an 18-year-old high school girl with a mature, slender, and tall 168cm build, sitting with her legs lightly crossed in a celestial, high-dimensional space. She possesses a small, perfectly proportioned face with a golden ratio contour and crystalline, ice-blue eyes with white pupils. Her straight, fluffy white hair is exceptionally long, reaching down to her feet and billowing dramatically around her. She is dressed in a white school uniform worn under a black robe, topped with a wide-brimmed witch's hat. One hand rests on her leg while the other is placed lightly near her mouth; she wears a mischievous, playful smile. The background is a fantastical, galaxy-like void filled with shimmering cosmic dust and ethereal nebulae. The image is a high-quality anime illustration with a luminous, otherworldly glow, a cool color palette dominated by whites, blacks, and deep cosmic blues, and a surreal, mystical atmosphere.
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