Robin made a MBTI test again and tested as an INTJ:

Your test results

Type “The Architect” (INTJ-T) Traits Introverted – 60% Intuitive – 89% Thinking – 57% Judging – 51% Turbulent – 61% Role Analyst Strategy Constant Improvement

It is the same MBTI type that Friedrich Nietzsche, Nicola Tesla and Roger Waters are said to be! The fictious INTJs include Mr Spock!”