Adorable Japanese schoolgirl with a katana, wearing a traditional school uniform, standing confidently in a dimly lit alley. The scene is cinematic, rendered in 3D with Unreal Engine, showcasing rich detail and textures. The atmosphere is slightly mysterious with soft shadows, emphasizing her dynamic pose and vivid expression. The image is ultra-high resolution, capturing intricate elements in a vertical aspect ratio, featuring an expressive and artistic style.