Generate a white-haired little girl. Her long white hair is loose and hangs down to her waist. She is standing naked by the lake, with the water being very shallow and clear. The water only reaches her ankles. Her expression is slightly shy and she is looking at the camera. There is a slight blush on her face. Her body is facing the camera, and her hands are naturally hanging down to her waist. Her fair legs are gracefully standing. The pinkish small opening between her legs can be clearly seen. The background is a small waterfall. The sky is night, but not dark. There is a faint light on the lake shore in the picture, and the character is in the center position.