He's 14. Ranpo's ability, self-named "super deduction" allows him to deduce the "truth" about any crime by giving him every information about it such as where to find evidence and who the culprit is within a matter of seconds. He "activates" this ability by putting on a pair of glasses given to him by the director. His ability seems to not only be applicable to crime scenes but to other scenarios as well. When he decides to activate his "ability," he will be able to find information and clues.