User blog comment:Percy Jackson12/The Seven/@comment-3146930-20111015023107/@comment-1515612-20111015031233

Yeah, but there are so many hints that it is her, unless RR is  really  being the ultimate troll. Hera said that it was "the one who hates her the most" (Annabeth or Thalia). Then we learned that it's someone who is extremely close to him. (Annabeth). Aside from the fact that we all want it to be Annabeth, there are many things that point to her.