1girl, absurdres, ball, bare_arms, bare_legs, bare_shoulders, beachball, black_horns, black_one-piece_swimsuit, blue_archive, demon_horns, feet_out_of_frame, highres, hikaku_(siyrgr), hina_(blue_archive), hina_(swimsuit)_(blue_archive), horns, innertube, long_hair, multiple_horns, official_alternate_costume, one-piece_swimsuit, parted_bangs, purple_eyes, school_swimsuit, solo, swim_ring, swimsuit, very_long_hair, water, whistle, whistle_around_neck, white_hair