1girl, areaaaron, arknights, bare_shoulders, bikini, black_bikini, breasts, burnt_clothes, cleavage, closed_mouth, criss-cross_halter, day, flower, full_body, hair_ornament, halterneck, hat, horns, long_hair, looking_at_viewer, navel, official_alternate_costume, outdoors, purple_eyes, red_hair, side-tie_bikini_bottom, sitting, solo, star_(symbol), straw_hat, sun_hat, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit