1girl armpits arms_up black_halo black_horns black_skirt black_thighhighs blue_archive demon_girl demon_horns hairband halo highres hina_(blue_archive) horns long_hair looking_at_viewer looking_to_the_side multiple_horns sasanoha_(sasanoha0712) simple_background skirt solo thigh-highs tying_hair very_long_hair violet_eyes white_background white_hair