Shinichiro had casually styled short hair that matched his dull black eyes. He was slender, tall, with a heart-shaped face, much like his younger brother Manjiro Sano. Shinichiro is described as "weak to women, weak in fights, but reliable." Shinichiro was a well-known rowdy with an unrivaled reputation, earning the respect of many bullies like those in his gang Shinichiro also had many friends, but he trusted only a few, including Wakasa, his childhood friend.(