Muscular female biker, extremely defined physique. Wearing traditional Oni mask. Leather jacket, sleeveless, revealing bulging arm muscles. Ripped jeans, heavy boots. Sitting on custom chopper motorcycle. Urban nighttime background. Photorealistic style, ultra-high detail, 8K resolution. Cinematic color grading, high contrast. Intimidating pose, hands gripping handlebars. Slight smoke effect around motorcycle tires.