1girl, bare_arms, bare_shoulders, black_one-piece_swimsuit, blue_archive, breasts, covered_navel, grey_hair, hair_ornament, hairclip, halo, hina_(blue_archive), hina_(swimsuit)_(blue_archive), holding, holding_whistle, horns, koishi_(kiwi0314), long_hair, looking_at_viewer, low_wings, multiple_horns, old_school_swimsuit, one-piece_swimsuit, purple_eyes, purple_wings, school_swimsuit, simple_background, small_breasts, solo, swimsuit, very_long_hair, wet, whistle, whistle_around_neck, white_background, wings