A hyperrealistic portrait of a futuristic Cyberpunk Geisha Assassin, meticulously detailed and cinematic. Her striking porcelain-like face features subtle traditional geisha makeup contrasted with neon-lit cybernetic enhancements around her eyes and jawline. Intricate mechanical augmentations blend seamlessly with her elegant attire, consisting of traditional silk robes adorned with luminous fiber-optic patterns and subtle holographic details. Her hairstyle is a modern take on traditional geisha styling, intricately woven with neon strands and metallic accessories. She holds a high-tech, stealthy katana with a glowing blade that matches the vibrant neon hues of her environment. The background is a moody cyberpunk cityscape drenched in neon colors, holographic signs, and atmospheric mist, enhancing the enigmatic and deadly aura of the assassin. Cinematic lighting, ultra-detailed textures, dramatic shadows, 4K resolution, trending on ArtStation, vivid colors, hyperrealistic rendering.