As an adult, Naoto is a man with black hair parted to the right. He usually has a serious expression on his face, befitting his occupation as a detective. During work, he wears a formal attire consisting of a white button-up, which is secured with a maroon-colored tie under a light gray coat styled in an american cut with peak lapels and slacks of the same color. His footwear consists of a pair of brown oxfords.