Yumi has black hair cut in a short bob hairstyle which shows her forehead and a slender build

Yumi wears a black sweater which doesn't cover midriff, letting it visible, black pants, and black boots. 

On Lyoko, she is dressed in a black and red sleeveless skirt-length kimono, red leggings, white hand-length sleeves, black thigh-length with white bandages wrapping her shins, a large yellow bow that ties together on her back, face powdered pure white like a geisha and her black hair is tied.