Anime Girl by Mountain Stream

Create a high-resolution anime illustration of {argument name="character name" default="Atri"}, a delicate young anime girl sitting on a large mossy river rock with her bare feet dipped in clear shallow water. She has very long {argument name="hair color" default="silvery white"} hair flowing past her waist, soft bangs, two small black ribbon hair bows near the sides of her head, large pink-red eyes, fair skin, and a gentle open-mouth smile while looking toward the viewer. She wears a frilly white summer camisole and matching ruffled shorts, with small dark navy bow accents on the chest and at the side of the shorts. The pose is relaxed and graceful: seated three-quarter view, one hand resting behind her on the rock for support, the other near her thigh, both legs extended diagonally into the sparkling stream.

Set the scene in a bright idyllic mountain riverside during {argument name="season and weather" default="a sunny summer afternoon"}: transparent green-blue water revealing rounded pebbles beneath, sunlight glittering on ripples around her feet, a rocky bank lined with grass and wild greenery, dense leafy trees casting dappled shade, distant forested mountains, a small bridge or rural building far in the background, and a vivid blue sky with soft white clouds. Use a polished Japanese visual novel / modern anime key visual style with highly detailed hair strands, luminous skin highlights, crisp linework, saturated natural colors, soft atmospheric depth, cinematic composition, and 4K-level detail. Emphasize sparkling water reflections, warm sunbeams through leaves, peaceful rural freshness, and a wholesome serene mood. No text, no watermark, no extra characters, no damaged artifacts, no distorted anatomy.