1girl, :o, animal_ear_fluff, animal_ears, bare_arms, bare_shoulders, black_one-piece_swimsuit, blue_eyes, blush, collarbone, competition_swimsuit, covered_navel, grey_hair, groin, hair_ornament, halo, hand_up, looking_at_viewer, official_alternate_costume, one-piece_swimsuit, parted_lips, signature, solo, standing, swimsuit, water, wolf_ears, shiroko_(blue_archive), shiroko_(swimsuit)_(blue_archive), blue_archive, year_2023, 