A Reader is someone who enters the world of others, not to cause harm, but rather to change the ending of the original story of the world.
They aren't part of these worlds; they aren't part of any of the power systems. If one were to enter a world where humans had tails and lived under the water. They would not have those qualities that even a toddler would have.
Special in any book, sometimes, keeping their identity is quite hard. But they know that revealing who they are might cause them to be hard on their journey to reaching the end.
Though even if not part of the system, they have their own, of course.
The Codex, which was the same thing that allowed them to go between worlds. It gives them an identity, powers to be able to handle the worlds they enter, no matter what they might hold.
