haihara yuuya, agnes tachyon (umamusume), umamusume, commentary request, highres, 1girl, ahoge, animal ears, bell, bow, box, brown hair, buck teeth, capelet, chibi, christmas, christmas present, dress, earrings, fur-trimmed dress, fur-trimmed headwear, fur trim, gift, gift box, green bow, guinea pig, hair between eyes, hat, holding, holding reins, horse ears, horse girl, jewelry, long sleeves, medium hair, merry christmas, pointing, pointing forward, red capelet, red dress, red eyes, reins, santa costume, santa dress, santa hat, single earring, sleigh, smile, solo, teeth