1girl, 3, ahoge, blue_archive, blush, collarbone, demon_girl, demon_horns, demon_wings, forehead, hair_ornament, hairclip, halo, hina_(blue_archive), hina_(swimsuit)_(blue_archive), horns, in_water, lifebuoy, long_hair, looking_at_viewer, name_tag, ocean, official_alternate_costume, old_school_swimsuit, one_side_up, purple_eyes, school_swimsuit, sidelocks, sido_(ama_r007), simple_background, sleeveless, solo, swimsuit, wet, wet_clothes, wet_swimsuit, whistle, whistle_around_neck, white_hair, wings