A medium shot, 3/4 view anime illustration in the Demon Slayer art style featuring Helen Kocho, a serene young woman standing gracefully. She has very long, straight black hair with a subtle blue sheen that cascades down her back, complemented by short bangs and blue butterfly-wing hair ornaments. Her large, luminous violet-blue eyes gaze calmly at the viewer. She wears the traditional black Demon Slayer Corps uniform beneath a pale white-to-light-blue gradient haori that resembles pure snow. Her right hand rests gently on the hilt of her Nichirin sword, which features an icy blue guard shaped like frozen crystals. The background is a mystical winter scene filled with swirling snowflakes and shimmering stars, creating a cold yet tranquil atmosphere. The color palette is dominated by cool tones of white, blue, and deep black, with soft, ethereal lighting that emphasizes her elegant and poised presence.