User blog comment:TheChosenOnes/If you were Rick Riordan, who would you make the Seventh be?/@comment-96.5.63.22-20111206010225

I hope it's Nico. My reasoning that it could be him is the secondary prophecy in this series says "The Daughter of Wisdom will walk alone." Hera already said Annabeth could cause problems. So that points away from Annabeth being the seventh. The six we know of are children of the Greek big three of their Roman forms and/or have special powers. And the Greeks and Romans won't trust each other but both sides trust Nico. Plus being a child of Hades he and Hazel might could lead the seven to the doors of death.