Formerly involved with a prolific bulgarly ring in Kamurocho, Sugiura is a cocky and playful young man who's not afraid to get his hands dirty. Now involved with the Yokohama 99 Detective Agency, his investigative skills are top notch, using to his advantage his time as a thief to investigate and look into things others couldn't. He's rather devious and not afraid to break a few rules, but his emotional attachment to his late sister still lingers, and he's prone to outbursts related to the topic