Age: 26
Birthday: October 21
Height: 168 cm
Weight: 57 kg
Blood type: O
Likes: Logical thinking, fantasy horror
Dislikes: Common sense, useless knowledge
Ability: Super Deduction; allows him to deduce the "truth" about a certain situation/crime and giving him complete information such as where to find evidence and who the culprit is within a matter of seconds. Ranpo "activates" this ability by putting on a pair of glasses given to him by the director.

Eventually, it is revealed that he is able to deduce everything simply due to his own extraordinary intelligence and that he does not possess an ability. Ranpo however, if not unaware of this fact, denies it and continues to believe that he is an ability user.