1girl, barefoot, breasts, chaldea_logo, covered_navel, facial_mark, fate/grand_order, fate_(series), forehead, forehead_mark, long_hair, looking_at_viewer, medusa_(fate), medusa_(rider)_(fate), one-piece_swimsuit, pool, poolside, purple_eyes, purple_hair, sitting, solo, sou_skate714, swimsuit, wet