1girl, animal_ears, armband, balladeluce, blush, border, character_name, from_side, greyscale, horse_ears, horse_girl, horse_tail, leaning_forward, long_hair, looking_at_viewer, monochrome, neo_universe_(umamusume), on_one_knee, shadow, sleeves_past_fingers, sleeves_past_wrists, solo, sparkle, tail, umamusume, very_long_hair, white_background