A photorealistic portrait of a royal knight girl in futuristic armor, with sleek, metallic surfaces that reflect a neon-lit cityscape. The armor is intricately detailed with holographic emblems and glowing circuits, giving it a high-tech, regal appearance. The knight’s face is partially covered by a transparent, visor-like helmet, revealing sharp, noble features and piercing eyes. The background is a bustling futuristic city with towering skyscrapers and flying vehicles, bathed in cool blue and purple hues.