1girl, ahoge, arknights, ass, bare_shoulders, beach, bikini, bird, black_hair, blue_eyes, blue_sky, breasts, celina, cloud, cowboy_shot, day, frilled_bikini, frills, from_behind, hair_bun, hair_ornament, hairclip, holding, holding_clothes, holding_jacket, horizon, id_card, innertube, jacket, la_pluma_(arknights), la_pluma_(summer_flowers)_(arknights), looking_at_viewer, looking_back, mouth_hold, ocean, official_alternate_costume, outdoors, short_hair, sideboob, single_hair_bun, single_side_bun, sky, small_breasts, solo, swimsuit, unworn_jacket, water, whistle, whistle_around_neck, white_bikini, wing_hair_ornament, x_hair_ornament