Hiyoko is a 4'2'', 68 pound, 19 year old girl with a young, slender appearance. 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.