agnes tachyon (umamusume), shiori novella, yorick (shiori novella), hololive, hololive english, umamusume, commentary, commission, english commentary, highres, 1girl, agnes tachyon (umamusume) (cosplay), animal ears, black hair, black nails, black pantyhose, book, closed mouth, coat, cosplay, grey hair, holding, holding quill, horse ears, horse girl, horse tail, lab coat, looking at viewer, multicolored hair, pantyhose, paper, quill, sleeves past fingers, sleeves past wrists, slime (creature), slime (substance), smile, solo, split-color hair, sweater, tail, test tube, two-tone hair, virtual youtuber, white coat, xiaooo22, yellow eyes, yellow sweater