Shuichi has a slightly worn black cap which has three white horizontal lines running across the back. He has grayish-yellowish irises, long eyelashes, a light complexion, and his hair, dark Prussian blue, has a medium cut. Shuichi seems to have a calm, polite and slightly shy personality; rarely making the first move in social situations or where he had to take the initiative and almost always distrusting himself, saying that he doesn't deserve his Ultimate Detective title.