Alec

He's the brother of Jane and the duo is notoriously called the "witch twins." We probably won't get to see Alec in action as his power isn't revealed until Breaking Dawn.

Special ability: Alec doesn't use his power as frequently as Jane in the books, but it is still more potent. He can desensitize people, as in cut off their sense of sight, smell, feeling and hearing--perfect for confusing the enemy before attack.