Create a hyper-detailed image of a dark elf instagram model with striking black hair, standing confidently in a vast underground cave complex. Emphasize her athletic physique and her captivating reflective eyes highlighted by expertly applied makeup and mascara. The setting should feature fog and soft lighting, adding depth and drama, along with high-quality film grain to the image. Capture the scene with the precision and clarity of an 8k UHD shot, reminiscent of a Fujifilm XT3 photograph. Showcase her stylish attire with hints of cleavage and bare legs accentuated by high heels. Ensure the atmosphere feels mystical and otherworldly, suitable for trending on ArtStation and CGSociety. Include subtle features like cat ears and soft clouds in the background to enhance the ethereal quality, while avoiding any elements that detract from the majestic and graceful portrayal of the character.