2girls, ass, bikini, blonde_hair, blue_bikini, blue_eyes, breasts, butt_crack, closed_mouth, detached_sleeves, eka_eri, expressionless, fate/grand_order, fate_(series), frankenstein's_monster_(fate), frankenstein's_monster_(swimsuit_saber)_(fate), frankenstein's_monster_(swimsuit_saber)_(first_ascension)_(fate), front-tie_bikini_top, front-tie_top, green_eyes, hair_bun, hair_over_one_eye, halterneck, horns, looking_at_viewer, lying, mechanical_horns, mordred_(fate), mordred_(swimsuit_rider)_(fate), mordred_(swimsuit_rider)_(first_ascension)_(fate), multiple_girls, on_back, on_stomach, pillow, pink_hair, ponytail, red_bikini, side-tie_bikini_bottom, single_detached_sleeve, small_breasts, string_bikini, swimsuit