User blog comment:Hermione Chase/"The Blood of Olympus" Expectations/@comment-9703010-20140723133919/@comment-3146930-20140727063621

It is more likely that Octavian is speaking Gaea's voice because even if he isn't being controlled by her, he is unknowingly helping her. At another point in the book during a similar dream, Reyna speaks in Athena's voice because Athena knows Reyna needs to be the one to return the statue. Gaea and Athena aren't controlling them, but they are still helping them even if they don't know it.