fuji musume, biko pegasus (umamusume), umamusume, absurdres, highres, 1girl, alternate costume, animal ears, aqua bikini, beach, bikini, blue eyes, blue sky, brown hair, cloud, day, flat chest, frilled bikini, frills, hair ornament, horse ears, horse girl, horse tail, long hair, looking at viewer, navel, ocean, outdoors, short hair, sky, solo, star (symbol), star hair ornament, swimsuit, tail, thighs