1girl, ahoge, arknights, beach, bikini, bikini_under_clothes, black_bikini, breasts, cleavage, clothes_lift, demon_horns, evening, feet_out_of_frame, hair_ornament, horns, lifted_by_self, long_hair, medium_breasts, molianmengdada, official_alternate_costume, palm_leaf, parted_lips, purple_eyes, red_hair, shirt, shirt_lift, side-tie_bikini_bottom, solo, star_(symbol), star_hair_ornament, sunset, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, wading, water, white_shirt