While other characters like President Alma Coin and Johanna Mason could be considered antagonists in certain aspects, Snow is the ultimate villain. He's the mastermind behind the Hunger Games, and he's responsible for the suffering of the districts.
Here's why Snow is the main antagonist:
* He orchestrates Katniss's return to the Games: He manipulates the situation to force Katniss back into the arena, knowing it will cause chaos and unrest.
* He represents the oppression of the Capitol: Snow embodies the cruelty and power-hungry nature of the Capitol, which has enslaved the districts.
* He's Katniss's primary opponent: He is the ultimate threat to Katniss and her rebellion, and he's the one she must defeat to bring about change.
While other characters have antagonistic qualities, they don't hold the same level of power and influence as President Snow, who acts as the driving force behind the conflict in Catching Fire.