1girl, alternate_costume, animal_ears, bad_pixiv_id, blue_eyes, blue_jacket, blush, bow, brown_hair, chakuma_(yiyh1468), chestnut_mouth, cup, drinking_straw, hair_bow, happy_birthday, holding, holding_cup, hood, hoodie, horse_ears, horse_girl, horse_tail, jacket, leg_up, long_hair, looking_at_viewer, multicolored_hair, outdoors, ponytail, signature, sitting, solo, streaked_hair, tail, tokai_teio_(umamusume), tree, two-tone_hair, umamusume, very_long_hair, white_hair, white_hoodie