Twilight's vampire lore is surprisingly detailed when you dig into it! The main Cullen coven consists of 7 members: Carlisle, Esme, Edward, Alice, Jasper, Rosalie, and Emmett. But the universe expands way beyond them—the Volturi alone have at least a dozen named members like Aro, Caius, Marcus, and their guards. Smaller covens like the Denalis add 5 more, and random nomadic vamps like James' trio pop up throughout the saga.
What fascinates me is how Stephenie Meyer built this hierarchy—almost like vampire nobility with ancient lineages. The Amazonian coven and Egyptian vampires from 'Breaking Dawn' show how globally diverse the population is. If we count every vampire named or appearing across all books and films, we're easily looking at 30+ unique characters. Though Meyer never gives a concrete worldwide number, the sense of a hidden society makes their world feel alive and sprawling.