A charming young woman with vibrant white ponytailed hair and a horn headband, dressed in a sleek dark denim jacket, carries a backpack with a visible katana handle peeking out. Her striking blue eyes glimmer within a cyberpunk-themed subway setting, captured in hyperrealistic and photorealistic detail. The scene is rendered in 8k using unreal engine, showcasing a 3d rendered environment. The composition is in a 9:16 aspect ratio, with an expressive style and a touch of creativity that brings this futuristic world to life, enhancing the character's vibrant aura.