Ranpo takes extreme pride in his "ability" ("Ultra Deduction") which can solve any mystery in mere seconds, with which he has solved countless cases. With his incredible intelligence, he is commended for it by the rest of the Armed Detective Agency, even more so because he lacks an ability. He is often found bragging about his status as the greatest detective in the world.Ranpo is also shown to be rather childish, frequently teasing the other detectives in the Agency.