Regular

Definition
A Regular is someone who has been chosen from the Outer Tower to climb the Inner Tower. However, a few are also chosen from outside of the Tower The choice of who will climb is made by Headon, the Guardian of the 1st Floor. Regulars are chosen because they have a strong desire(please confirm) they wish to fulfill(money, women, beauty, strength, to avenge a friend's death, a promise they made to a friend, to see the stars, etc.).

Note: The key difference between Regulars and Irregulars is this. Regulars are chosen by Headon and then, instantly teleported to the Second Floor. However, Irregulars simply force open the door of the Tower and are then, teleported to the First Floor to take the Guardian's test(conducted by Headon).

Climbing the Floors and their Rights
The Regulars must take a series of Tests every time they climb a floor. And due to the difficulty of the complex testing system on the Second Floor(Floor of Test), many fail there which means they are stripped of their rights and returned to the Outer Tower or outside of the Tower.

From the 3rd Floor and on, it's a bit different. Even if they fail, the have the right to retake the test. Because the difficulty is not that high, they say that most of those who pass the Floor of Test also pass the rest. If they give up in the middle, they are stripped of their rights and are sent to the Middle Area.

From the 20th Floor, the right to reside in the Middle Area is granted, so while they dwell in the Middle Area by themselves or with their family, many also take the test after entering the Inner Tower. Taking a test requires a lot of points(money) and due to the increase in difficulty, they say there are a lot of Regulars who gave up on the 20th Floor.

It's said that even if they've given up, their "premium" status as former regulars helps out a lot in their daily needs.

If a Regular reaches the 134th Floor of the Tower, they become a Ranker. Much like the relationship between Regulars and non-regulars, the relationship between Rankers and Regulars is likely similar to that of the ruling class and the subjected class.

Currently, many of the characters in the series are Regulars.