Shinichiro is the leader and founder of the Black Dragon gang. He is described as "weak with women, weak in fights, but reliable". He is a notorious delinquent with an unrivalled reputation who has won the respect of many delinquents, both within his gang and rival gangs. Although a poor fighter, his caring personality and ability to stand up for others, as well as his humble nature, have earned him the loyalty of many delinquents far stronger than him.