Ranbu has a high IQ.

Dazai Osamu, the mainstay of the Armed Detective Agency, a cheerful and mysterious young man, has a super high IQ, and his current ideal is to die in love with a beautiful woman. The job before joining the detective agency was one of the seven mysteries of the detective agency. The power he possessed was to nullify the physical abilities that come into contact with him, making him "disqualified from the world."

Edogawa Ranpo also has a super high IQ and can hide his Dazai Osamu well in front of others, but he cannot hide himself in front of Ranpo. Ranpo can deduce all the clues based on clues. This made Osamu Dazai feel helpless.

Ranpo thinks that his power is "super reasoning" and he can see the truth instantly as long as he puts on his glasses. However, he actually has no power because Dazai Osamu has tested it with "Human Disqualification". This is also The reason why Dazai Osamu was speechless was that Rampo had no superpowers, which meant that Dazai Osamu's superpowers had no use. Dazai Osamu really couldn't control Edogawa Ranpo.

About Ranpo:

Ranpo grew up with genius parents and was an only son who was inexperienced in the world. Ranpo's father is a legendary and well-known detective in the police-related industry. He has amazing observation and reasoning abilities and is known as "clairvoyance."

Ranpo’s mother is just a housewife without any title, but her reasoning ability is not inferior to that of Ranpo’s father. According to Ranpo, “My father can’t beat my mother in solving puzzles and reasoning.” , always defeated at home.”

In order to prevent Ranpo from going astray and from hurting anyone, Ranpo's parents knew that Ranpo had the ability to observe, remember and see through the truth in an instant. After gaining the ability, Ranpo's parents used their superhuman minds to allow Ranpo to grow up as an ordinary person before he had a mature mind, allowing him to take what he saw for granted.