User blog comment:SayuriDarling/The House of Hades Official Discussion/@comment-4730563-20131010083223

Ok loved the book!

Nico: If there was a way to make him more Greek I don't know how. But really to grow up in the 40s and just when you are beginning to figure things out about yourself that would never be accepted in that time period then to be yanked out of it while your mother died, and suddenly in an unfamiliar time though more accepting of what you are, and then the guy you are hero worshipping turned crush accidentally lets your beloved older sister be killed and you hold a grudge on him while crushing on him. Then it's revealed who your dad is and you are always going to be the outsider in the one place you'd be safe, and just when you've let go of your grudge your crush is clearly getting super close to his best friend. God his life is painful.

As for the Seven:

Percy & Annabeth:  They have gone through Tartarus and back they are clearly soulmates and realize this.

Jason: Has become a lot less generic now and has realized his heart is with the Greeks not the Romans. He's grown and his mask has cracked.

Frank: Has grown a lot, and seems to have finally accepted the fact that he's a son of Mars. His physical development is merely a reflection of his mental development.

Hazel: Has learned magic and control of the Mist and seems to finally be letting go of Sammy.

Piper: Realizes her charmspek IS useful and it is amazing that she manages to defeat Khione. She has grown.

Leo: Finally finds a girl who's interested and seems to be finding his place in the team.

So basically all the seven have gotten a major boost in power and are ready to fight. And yeah I suspected the Reyna, Nico, Coach Hedge thing happening because it means that the Seven head to Athens alone. Which I think it was fated to be.

And here's how I interpret the Prophecy of Seven:

Seven Half-Bloods will answer the call (Percy, Annabeth, Jason, Leo, Piper, Frank, and Hazel)

To storm or fire the world must fall (Gaea will be defeated by either Percy or Jason or Leo or Frank)

An oath to keep with a final breath (Leo's oath to Calypso, I know many people think it's Frank, but I don't think so Leo's worries at the start of this book seem to foreshadow his death)

And foe bear arms to Doors of Death (Annabeth and Percy with Bob (Iapetus) and Damasen)