1girl, animal_ear_fluff, animal_ears, artistic_error, barefoot, bikini, blue_archive, blue_bikini, blue_hair, blue_ribbon, blush, breasts, cat_ears, dark_blue_hair, extra_ears, frilled_bikini, frills, full_body, hair_ribbon, halo, hazuki_mashiro, long_hair, looking_at_viewer, official_alternate_costume, parted_lips, red_eyes, ribbon, serika_(blue_archive), serika_(swimsuit)_(blue_archive), simple_background, small_breasts, solo, swimsuit, twintails, white_background