A medium shot, eye-level anime illustration of a mermaid girl sitting atop a jagged rock inside a crystalline cavern, with a cascading waterfall flowing in the background. The girl has pastel green hair that flows softly around her shoulders and neutral black eyes with a serious, stoic expression; she sits with her hands resting gently on the cold surface of the stone. Her lower body is a radiant green mermaid tail with shimmering, iridescent scales that glint under the ambient light. The surrounding environment is a majestic cave filled with towering, translucent crystals of various sizes and shapes that refract light across the scene. A powerful waterfall plunges behind her, creating a mist of fine droplets and a soft white foam where it hits the water below. The lighting is ethereal and cool, with soft glows emanating from the crystals, a palette dominated by teals and emerald greens, and a serene yet mysterious atmosphere.
