A Regular is a being from inside The Tower that has been chosen to climb it. The choice of who will climb is made by Headon, the Guardian of the 1st floor. Regulars can be chosen for many reasons, such as intellegence, powers, fights, weapons, or seemingly just at random.
The Regulars must take a test or tests every time they climb a floor. Regulars have to obey Rankers as Rankers are much more powerful. When Regulars reach the 134th floor of the Tower, they become Rankers.
If a Regular leaves before they get to the 134th floor, they are not Rankers, and return to the Outer Tower. They may be given special treatment depending on how high they climbed.
Currently, most of the characters in the series are Regulars.