Shion is a cruel and bloodthirsty delinquent. His brutality scares even his gang members while his love for fighting earned him the moniker "Mad Dog" within Tenjiku. He is prideful in his strength, and as a result, is exceedingly arrogant. Shion is both rude and boastful with nothing to show for it while coupled with his lack of any respect or decency whatsoever. Despite this, he was very loyal to Izana Kurokawa by staying with him alongside the members of the S-62 Generation.