1girl, adjusting_hair, ahoge, armpits, arms_up, blue_archive, blue_one-piece_swimsuit, breasts, closed_mouth, collarbone, covered_navel, cowboy_shot, demon_horns, dutch_angle, halo, hina_(blue_archive), hina_(swimsuit)_(blue_archive), horns, long_hair, looking_at_viewer, low_wings, lulutaeri, multiple_horns, official_alternate_costume, one-piece_swimsuit, parted_bangs, partially_underwater_shot, purple_eyes, school_swimsuit, simple_background, small_breasts, solo, standing, swimsuit, wading, water, whistle, whistle_around_neck, white_background, white_hair, wings