1girl, ahoge, arm_support, bare_arms, blue_archive, blue_one-piece_swimsuit, blue_sky, blush, breasts, closed_mouth, cloud, collarbone, day, grey_hair, halo, hina_(blue_archive), hina_(swimsuit)_(blue_archive), horns, leaning_forward, lnji_(rnlwls34), long_hair, looking_at_viewer, low_wings, multiple_horns, ocean, official_alternate_costume, one-piece_swimsuit, one_side_up, outdoors, parted_bangs, purple_eyes, school_swimsuit, sky, small_breasts, solo, swimsuit, thighs, very_long_hair, water, wet, whistle, whistle_around_neck, wings