While there isn't a single clear-cut antagonist in the traditional sense, several characters could be considered antagonists depending on your interpretation:
* Mr. Elton: He is a self-centered and ambitious clergyman who initially misinterprets Emma's attention and makes inappropriate advances towards her. He also behaves badly towards Harriet, creating tension and misunderstandings.
* Frank Churchill: He is a charming but deceitful young man who plays games with Emma's feelings and keeps her in the dark about his true intentions.
* Mr. Knightley: While not a traditional antagonist, he acts as a foil to Emma and challenges her assumptions and behavior. His criticisms, while sometimes harsh, ultimately help Emma grow and learn from her mistakes.
It's worth noting that Austen's novels often explore the complexities of human relationships, and there isn't always a clear-cut division between good and bad characters. Each character has their own flaws and motivations, and it's up to the reader to decide who they consider the antagonist.