SD-H-I-Y 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 glowing, oval-shaped pale orange eyes. Her clothes consist of a traditional orange furisode kimono with a floral print pattern that consists of white and yellow blossoms, and a yellow-green obi sash.