* The Cullens: This coven is Bella's adopted family, composed of Edward, Alice, Rosalie, Emmett, Jasper, Esme, and Carlisle. They are a "vegetarian" coven, meaning they abstain from human blood and instead feed on animal blood. This is a crucial difference from other vampire covens and contributes to the conflict with the Volturi.
* The Volturi: This coven is the oldest and most powerful vampire group, known for their strict adherence to vampire law. They are led by Aro, Marcus, and Caius, and are responsible for maintaining order and enforcing rules within the vampire world. They are fiercely protective of their power and ruthlessly eliminate those who threaten their authority.
While other vampire covens are mentioned in the books, they are not specifically named or fleshed out in Breaking Dawn. For instance, the Romanian coven, led by Vladislaus, is briefly mentioned in Breaking Dawn, but their role in the story is minimal.
Therefore, the main covens in Breaking Dawn are the Cullens and the Volturi, representing opposing sides in the story's climax.