Final answer:
The married man who becomes one of Orual's most trusted friends and advisers in C.S. Lewis's novel 'Till We Have Faces' is The Fox, a philosopher and mentor to Orual.
Step-by-step explanation:
In C.S. Lewis's novel Till We Have Faces, the married man who becomes one of Orual's most trusted friends and advisers is called The Fox. The Fox is a philosopher and mentor to Orual, providing her with guidance and wisdom throughout the story. He is instrumental in helping Orual understand her own flaws and learn important life lessons.