User blog comment:SayuriDarling/The Demigod Diaries Official Discussion Blog/@comment-173.79.103.44-20120816025314/@comment-1515612-20120817014120

No, she's the 7th.

In the book it says,

Jason, Leo, Piper, Frank,

Hazel, Percy, and Annabeth

must unite to answer 

the prophecy's call