Semi-wa, magical girl, holding a glowing cube, transparent crystal sphere, intricate runes etched on surface, soft pulsing light, long curly silver hair, sparkly blue eyes, delicate features, pale skin, lace-trimmed white dress, layered petticoat, striped stockings, Mary Jane shoes, subtle smile, gentle posture, leaning forward, mystical atmosphere, dimly lit ancient library, towering bookshelves, leather-bound tomes, mysterious scrolls, warm golden lighting, soft focus, cinematic composition.