konoe ototsugu, mordred (fate), fate/grand order, fate (series), commentary request, game cg, official art, third-party source, 1girl, air bubble, aqua eyes, black one-piece swimsuit, blonde hair, blue background, breasts, bubble, collarbone, coral reef, day, diving, fish, light rays, medium hair, official alternate costume, one-piece swimsuit, outstretched arm, parted bangs, photo background, sidelocks, small breasts, solo, sunbeam, sunlight, swimming, swimsuit, underwater