1girl, alternate_costume, animal_ears, arm_up, armpit_focus, armpits, blue_eyes, blush, bow, breasts, finger_to_mouth, hair_bow, horse_ears, horse_girl, looking_at_viewer, ponytail, presenting_armpit, rarigo, santa_costume, simple_background, small_breasts, solo, tokai_teio_(umamusume), umamusume, white_background