1girl absurdres akagi_koku animal_ear_fluff animal_ears bangs black_one-piece_swimsuit blue_archive blue_eyes blue_sky breasts cloud competition_swimsuit covered_navel cross_hair_ornament day extra_ears grey_hair hair_ornament halo highres low_ponytail medium_breasts medium_hair mismatched_pupils multicolored_clothes multicolored_swimsuit official_alternate_costume one-piece_swimsuit outdoors shiroko_(blue_archive) shiroko_(swimsuit)_(blue_archive) sky solo swimsuit