agnes tachyon (umamusume), umamusume, highres, 1girl, ahoge, animal ears, black necktie, black pantyhose, black shirt, chemical structure, closed mouth, coat, collared shirt, ctlv, ear ornament, hand up, high heels, horse ears, horse girl, horse tail, lab coat, long sleeves, necktie, no pants, pantyhose, red eyes, shirt, shoes, short necktie, simple background, sitting, sleeves past fingers, sleeves past wrists, smile, solo, sweater, tail, white coat, white shoes, yellow background, yellow sweater