Sleepers

A Sleeper is someone who can enter Dreamworld through sleeping. Even though he may not realize it, when he appears in Dreamworld, his body is as physically there as it is physically in Realworld. If a Sleeper were to get a scratch across his arm in Dreamworld, he would wake up with a scratch on his arm in the Real World.

Entering Dreamworld
Even though it may seem as if nothing changes when going from one reality to another, a lot is happening. When a Sleeper enters the Dreamworld, his or her body begins a semi-unconscious state known as REM in Realworld. However, when a Sleeper enters Realworld from Dreamworld, his body vanishes completely in Dreamworld and he begins a process in Realworld known as "waking up". Upon re-entering Dreamworld, a Sleeper may or may not appear in the same spot he was previously residing in upon his initial exit. This causes for an everchanging population in Dreamworld because Sleepers are constantly going in and out, vanishing and reappearing, in various parts of the world.

Staying in Dreamworld
There is a way to remain in the Dreamworld and become a mere "ghost" in the Realworld but that secret is unspoken and known only by the Scholars who figure it out for themselves!

Lingering
As Sleepers experience more and more of the Dreamworld, most become unaware of the difference between the two realities and begin to linger in both worlds, causing them to here voices when they are awake in a state the Scholars call "Sleepwalking", though the word's meaning in the real world is not the same. Because of this condition, many Sleepers are known to be diagnosed as insane or Schizophrenic later in life even though it is quite clear that there is nothing abnormal about this condition given the real facts, which doctors push away to be mere fantasy.