rii dumb, obey your master (umamusume), umamusume, umamusume: cinderella gray, highres, 1girl, american flag, american flag print, animal ears, armband, armpits, arms up, bandana around arm, black armband, black shirt, blonde hair, blue eyes, blue hair, breasts, closed mouth, cropped shirt, flag print, horse ears, horse girl, long hair, looking at viewer, medium breasts, midriff, multicolored hair, navel, shirt, sleeveless, sleeveless shirt, smile, solo, star-shaped pupils, star (symbol), stomach, symbol-shaped pupils, tongue, tongue out, upper body