What lines from the odyssey best show the Cyclops to be an antagonist?

In Book 9 of "The Odyssey," the Cyclops, Polyphemus, is depicted as an antagonist when he traps Odysseus and his men in his cave, eating them one by one. He also displays his brutality and lack of hospitality by disregarding Zeus's laws, which is considered a grave offense in ancient Greek culture. Additionally, Polyphemus shows his arrogance and lack of empathy towards his captives, further highlighting his role as an antagonist in the story.