She has long blonde hair that is generally seen tied into thick, curved twin tails with two yellow-green ribbons, a white cat face accessory pinned in the center. Her bangs are curled and swept to the right, with two locks of chin-length hair curling outwards and framing her face. She has large, round, pale orange eyes. Hiyoko's cute appearance, voice, and (initially) her way of talking give off the impression she is innocent and childlike.