1girl, arknights, arm_behind_back, bare_shoulders, bikini, bikini_under_clothes, black_bikini, blue_sky, breasts, cleavage, cloud, cowboy_shot, criss-cross_halter, dutch_angle, falling_petals, flower, front-tie_top, groin, hair_between_eyes, hair_intakes, hair_ornament, halterneck, horns, long_hair, looking_at_viewer, medium_breasts, navel, official_alternate_costume, outdoors, parted_lips, petals, pink_flower, purple_eyes, red_hair, ryuinu, see-through, side-tie_bikini_bottom, sky, slit_pupils, solo, star_(symbol), star_hair_ornament, stomach, string_bikini, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, swimsuit_cover-up, thigh_strap