User blog comment:Percy Jackson12/The Seven/@comment-4529666-20111016215928

True to my last comment, I think those are the seven. I can (kinda) prove that Annabeth will be the seventh though. "The goddess smiled dryly. "We will see young hero. She (annabeth as mentioned in an earlier paragraph.) has a hard task ahead of her when you arrive in Rome. Whether she is up to it...I do not know. ~Hera The Son of Neptune, last chapter. (don't know the page. I have the kindle.