arko (acucs), tiamat (fate), fate/grand order, fate (series), 1girl, bare shoulders, blue hair, blue sky, blush, braid, breasts, cleavage, competition swimsuit, covered erect nipples, curled horns, hair between eyes, highleg, highleg one-piece swimsuit, horns, large breasts, long hair, looking at viewer, ocean, one-piece swimsuit, open mouth, pink eyes, pointy ears, sidelocks, sky, smile, solo, swimsuit, symbol-shaped pupils, thighs, very long hair, wet, wet clothes, white one-piece swimsuit