1girl, ass, back, bikini, black_bikini, blunt_bangs, bob_cut, bracelet, breasts, colored_inner_hair, demon_girl, ear_piercing, earrings, fate/grand_order, fate_(series), from_behind, halterneck, horns, jewelry, leaning_forward, looking_at_viewer, looking_back, multicolored_hair, oni_horns, parted_lips, piercing, pink_hair, pointy_ears, pool, poolside, profile, purple_hair, san_(harutuki_3), short_eyebrows, short_hair, shuten_douji_(fate), side-tie_bikini_bottom, sitting, soaking_feet, solo, swimsuit, thighs, two-tone_hair, water, wet