1girl, animal_ear_fluff, animal_ears, bikini, black_bikini, black_hair, blue_archive, blue_ribbon, blue_sky, cat_ears, closed_mouth, cloud, collarbone, day, extra_ears, frilled_bikini, frills, hair_ribbon, leepy, long_hair, looking_at_viewer, navel, ocean, official_alternate_costume, outdoors, pink_eyes, ribbon, serika_(blue_archive), serika_(swimsuit)_(blue_archive), sky, solo, stomach, swimsuit, twintails