copano rickey (umamusume), umamusume, highres, 1girl, ahoge, animal ears, armpits, arms behind head, ass, black one-piece swimsuit, blue sky, brown hair, cloud, competition swimsuit, cowboy shot, day, double bun, fang, from behind, hair bun, horse ears, horse girl, horse tail, karugami chan, lane line, looking at viewer, looking back, mismatched ear covers, multicolored swimsuit, one-piece swimsuit, open mouth, outdoors, pool, red eyes, sky, solo, swimsuit, tail, white hair