1girl, arm_up, armpits, azuma_(sospower73), blue_archive, blue_one-piece_swimsuit, breasts, demon_girl, demon_horns, demon_wings, halo, hina_(blue_archive), hina_(swimsuit)_(blue_archive), horns, light_blush, long_hair, looking_at_viewer, low_wings, one-piece_swimsuit, one_side_up, purple_eyes, school_swimsuit, sitting, small_breasts, smile, solo, swimsuit, very_long_hair, water, whistle, whistle_around_neck, white_hair, wings