agnes tachyon (umamusume), umamusume, commentary request, highres, 1girl, ahoge, alternate costume, animal ears, black ribbon, black shirt, boots, box, brown boots, brown hair, brown skirt, chemical structure, chocolate drip, cropped shirt, dot nose, earrings, facing viewer, hair between eyes, hand on own chest, heart-shaped box, holding, holding box, holding test tube, horse ears, horse girl, horse tail, jewelry, light blush, looking at viewer, medium hair, open mouth, pink shirt, plaid clothes, plaid skirt, red eyes, ribbon, shirt, single earring, skirt, skyk57milk, smile, solo, tail, test tube, thigh boots