User blog comment:BlueLantern1995/The Prophecies: What We Know and What is Logical/@comment-165.173.96.31-20121205180748/@comment-6266020-20130216040109

Well actually, when you think about it: Leo, Piper, Jason, Frank, Hazel, Nico is six. Perhaps someone else will join the party, and then Annabeth and Percy were not part of the 7 at all.