Most writers understand that their protagonist must change in some way, perhaps in many ways, as the story progresses. Event cause affect, which leads to the character growing or changing as a result.

            A good antagonist also changes. Give this character a new skill, strength, or personality trait. Perhaps make it something positive, something that might alter the antagonist’s outlook on the world.

            What if a kidnapper gets kidnapped? Might that give her a new perspective? What if a bank robber gets robbed? Or a thief had her house burglarized?

            Your task is to write a story in which the antagonist changes, just as the protagonist does.

            Have fun with this one.