Home»Game Guides»Persona 5 Royal Guide»Fool (Igor) Confidant Answers
You can make any dialog choices with Igor, and you rank up the Fool confidant automatically as you progress through the main story. You do not need a matching arcana persona when talking to Igor.
The Fool confidant starts at Rank 1 on April 12, and increases in rank until Rank 10 on December 24. This means that you need to not get a premature bad ending to the game on November 10 or on the morning of December 24. Please click those aforementioned links and see the schedule to see what dialog choices to make to not get a premature bad ending to the game, spoiler-free.