A charming young woman with flowing white ponytail hair adorned with a sleek horned headband, donning a midnight-blue denim jacket. She carries a backpack subtly concealing a katana, her striking blue eyes exuding a mysterious glint. Set against a cyberpunk-themed subway backdrop, the scene is captured in hyperrealistic detail, reminiscent of an 8k render from an Unreal Engine project. The vibrant, expressive style enhances her enigmatic presence, as neon lights dance around in a 3D-rendered urban landscape.