3girls, ahoge, arm_support, artoria_pendragon_(fate), bikini, bikini_skirt, black_bikini, blonde_hair, blush, braid, breasts, cleavage, collarbone, fate/grand_order, fate_(series), french_braid, frilled_bikini, frills, hair_intakes, jeanne_d'arc_(fate), knee_up, kneeling, large_breasts, looking_at_viewer, medium_breasts, multiple_girls, navel, nero_claudius_(fate), nero_claudius_(fate/extra), o-ring, o-ring_bikini, ruuto_(pixiv26998067), saber, simple_background, sitting, smile, swimsuit