Shinichiro had unkempt short hair similar to the color of his dull black eyes. He was slim, six feet tall, and had a heart-shaped face, notably looking a lot like his younger brother Manjiro Sano. His lips were thin and he would regularly smoke a cigarette. Despite running a motor shop, he was never seen wearing a uniform and opted to sport casual clothes instead. He would wear a pearl white shirt, light wash jeans, and a pair of slip-on shoes for footwear. Sometimes while working, he had a jack