Every Chosen One has a protector in the world, called an Osirion. An Osirion is usually the oppisite of their Chosen One. No one knows what the Osirion's duties are yet, not even the current Osirion, Eddie!
Sarah's Osirion is Rufus Zeno, Victor Rodenmaar Sr. reveals that it went terribly wrong.
Nina's Osirion is Eddie! Many people think that this will put a dent in Fabina and Peddie.