sena kizahashi, stay gold (umamusume), umamusume, 1girl, adjusting eyewear, animal ears, bare shoulders, bikini, black bikini, black hair, blue sky, breasts, brown eyes, brown hair, brown shirt, closed mouth, cloud, collarbone, hair between eyes, horse ears, horse girl, horse tail, long hair, looking at viewer, midriff, multicolored hair, navel, ocean, outdoors, shirt, sky, small breasts, smile, solo, stomach, streaked hair, sunglasses, swimsuit, tail, water, white hair