"It's perfect (whisper)...It is the perfect city. It will not fall to an attack."
― Ou Sen to A Kou and his vassals on the city of Gyou (Kingdom)

The power to sense reasons in any situation. Variation of Intuitive Aptitude

Also Called

  • Flawless Logical Thinking
  • Reason Sense
  • Logic Awareness/Detection/Perception/Sense


The user can intuitively know all of the reasons for anything, whether possible or actual. For example, they can sense every reason why someone does not want to do something as well as why a machine does not work.




  • May not have the skills or means to deal with the reasons of a situation.
  • May begin to feel the inability to relate to others whom can't keep up with users logical reasoning.
  • Might seem pompous to other people who can't understand the logical reasoning. 
  • The shrewd, detached way of looking at the world, can be unsettling for others.
  • Usually unable to shut off faculty.

Known Users

  • Marcus Ayers (Alphas)
  • Quantitative Aptitudinal Alphas (Alphas)
    • Skylar Adams (Alphas)
    • Zoe Adams (Alphas)
  • Sherlock Holmes (Batman: The Brave and the Bold)
  • Edogawa Ranpo (Bungou Stray Dogs)
  • Fyodor Dostoevsky (Bungou Stray Dogs)
  • Mori Ougai (Bungou Stray Dogs)
  • Osamu Dazai (Bungou Stray Dogs)
  • Contractors (Darker than Black)
  • Bruce Wayne/Batman (DC Comics)
  • Slade Wilson/Deathstroke (DC Comics)
  • Various Characters (Kingdom)
    • Ou Sen
    • Shun Sui Ju
  • Rick Sanchez (Rick & Morty)
  • Johan Liebert (Monster)
  • Sherlock Holmes (Sherlock Holmes novels)
  • Mycroft Holmes (Sherlock Holmes novels)
  • Professor Moriarty (Sherlock Holmes novels)
  • Rimururu Tempest (That Time I Got Reincarnated As a Slime); via Great Sage


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