Four of Pentacles/Ravenclaw: Dolores Umbridge
Reasoning: The control-freak card. This represents one who is greedy, demanding and obstinate. They block progress and change, needing to maintain the status quo (which they, of course, create and enforce). Dolores Umbridge invades Hogwarts and enforces her own version of order, controlling through frightening and threatening means. She resists anything that is not ordered by her, and hangs onto her little educational decrees and Ministry policy.