Yumeko is a very attractive pale-skinned girl with lower waist length black hair that has bangs styled in a hime-cut where it covers her eyebrows along with two curved streaks at the side of her face, brown eyes (her eyes are sometimes seen glowing red whenever she becomes excited in the anime/manga) and a large bust.

She wears the standard female Hyakkaou Private Academy issued uniform; a red blazer with black trim lining the cuffs and collar, a white button-up dress shirt, a dark pleated skirt, a tie and black/grey stockings. As well as the academy's issued footwear, brown loafers with black soles. She also sports pale pink lipstick, red painted fingernails (sometimes seen as pink) and a ring around her left thumb.