Shinichiro is described as being "weak to women, weak in fights, but reliable." Shinichiro was a notorious delinquent with an unequaled reputation who garnered the respect of many delinquents, both inside his gang and those of rival gangs. Although he was a terrible fighter, his caring personality and ability to stand up for others, along with his humble nature earned him the loyalty of many delinquents much stronger than him. His bike shop became a place where delinquents could gather freely.