Make more of the background

In game cards the focus is obviously on the character, but backgrounds and other details add a whole new dimension. You can hint at a character’s personality through their environment or describe their social status or occupation with various nearby objects. A scholarly character could be surrounded by old tomes and scrolls, a warrior will look more menacing with a stormy sky as a backdrop, and a character could be recognised as a witch even without stereotypical costumes, only by decorating her place with alchemical paraphernalia and other mysterious-looking items.