1girl, alternate_costume, animal_ears, armpits, arms_up, blue_eyes, blush, breasts, grey_hair, hair_between_eyes, hair_ornament, hitomin_(ksws7544), horse_ears, long_hair, looking_at_viewer, official_alternate_costume, simple_background, small_breasts, solo, tamamo_cross_(fierce_thunder_god)_(umamusume), tamamo_cross_(umamusume), umamusume, white_background