1girl alternate_color animal_ears black_background black_leotard black_thighhighs brown_eyes brown_hair detached_sleeves gradient_background green_eyes hairband headgear horse_ears horse_girl horse_tail leotard long_hair looking_at_viewer machinery mihono_bourbon_(umamusume) necktie pataneet red_necktie solo standing tail thighhighs turtleneck umamusume