1girl, animal_ears, arms_behind_back, azuma_satsuki, blue_eyes, flower, hair_flaps, hair_flower, hair_ornament, horse_ears, horse_girl, horse_tail, medium_hair, navel, official_alternate_costume, open_mouth, sakura_chiyono_o_(sakura_hearts_are_super_good_hearts)_(umamusume), sakura_chiyono_o_(umamusume), simple_background, solo, swimsuit, tail, umamusume