Scene by the riverbank during the day. An adult woman is shown in a close-up full-length shot; her left arm is fully visible and naturally lowered along her body. She is wearing a modest elegant outfit with Chinese motifs and an exposed shoulder. Appa is standing, noticeably larger than Katara: his body and large tower over her. Appa playfully touches her shoulder with his tongue, as if greeting her in a friendly way. Katara is smiling. In the background: the river, stones, green riverbank, sunlight and water reflections. Bright adventurous fantasy cartoon style, clean outlines, expressive facial expressions, friendly atmosphere, no romantic or sexual subtext. Negative prompts can be added: Do not crop the left hand, do not hide the hand, do not make Appa smaller, do not make the scene gloomy, do not add extra limbs, do not change Katara's pose, no fetishistic focus on the body.