Anime swordswoman by a mountain waterfall with katana drawn

Adult female Japanese demon-slaying swordswoman, long flowing black-blue hair, elegant dark uniform with a blue patterned haori, standing beside a rushing mountain waterfall, katana extended gracefully, swirling water forming elegant wave patterns around her, cool mist, dramatic sky, intense sparkling eyes, highly detailed sword and clothing, cinematic anime lighting, beautiful Japanese scenery, ultra-detailed 4K UHD, HDR, vertical 9:16, no text, no watermark.