The Good Doctor is a Devil of Crimson that jumps between the bodies of people in situations where they might make a Devil Deal, manifesting as one of the host’s eyes. He is potentially linked to the Sanitorium.

The Good Doctor has made devil deals with:

The Good Doctor Failed to get a deal with Louen Leonceur, whom refused to surrender his principles and chose to embrace his death, fighting for the party, over sacrificing his soul.