Heirs to the ice princess

Percy and his twin sister Echo were betrayed by everyone they had ever loved. Cheated on, disowned, and their loving mother Sally slaughtered.

They run away from camp to the only place where they'll never be bothered

Alaska.
What will happen when Khiolne starts to fade and they take her place as her heirs?

Disclaimer: I DO NOT OWN PJO
Now let's get on with the story..