official art, unity 8k wallpaper, ultra detailed, aesthetically pleasing, High quality, masterpiece, best quality, looking above, (1girl), (school uniform), (a girl looks out to see a giant mechanical demon facing her), (in a city that has become ruins), black hair, holding sword, lycoris flower, ready for battle, fight to the death, (red, black), darkness, red sky, demon, (red, black), abyssal,  complicated background,