seppatsumaru, mejiro ardan (umamusume), umamusume, absurdres, commentary request, highres, 1girl, animal ears, arm under breasts, black one-piece swimsuit, blue hair, braid, breasts, character name, collarbone, competition swimsuit, covered navel, crown braid, highleg, highleg one-piece swimsuit, horse ears, horse girl, horse tail, large breasts, long hair, looking at viewer, one-piece swimsuit, purple eyes, solo, swimsuit, tail, two-tone swimsuit, zoom layer