Shinichiro had short, unkempt hair, similar to the color of his dull black eyes. He was thin, 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 regularly smoked a cigarette. Shinichiro is described as being “weak with women, weak in fights, but trustworthy”. Shinichiro was a delinquent but a terrible fighter, He is known for his caring and humble personality.