1girl, arm_support, bare_legs, bat_wings, black_horns, blue_archive, blush, bow, closed_mouth, demon_wings, feet, flat_chest, full_body, halo, hand_up, hina_(blue_archive), hina_(swimsuit)_(blue_archive), horns, innertube, long_hair, looking_at_viewer, low_wings, namaru_(summer_dandy), name_tag, one-piece_swimsuit, one_side_up, partially_submerged, pink_bow, pink_eyes, pout, purple_eyes, sandals, school_swimsuit, simple_background, sitting, solo, starfish, swimsuit, toes, very_long_hair, water, water_drop, wet, whistle, whistle_around_neck, white_background, white_hair, wings