Arbitrator

Arbitrators are mages with unique abilities, and each one possess their own attribute. All of them possess high class magic close to a Paladin, some are Paladin class. Paladins call this place their home. Respectively, It consists of pillars that each member to stand on. Unlike the Trinity Seven, they can use their abilities without Grimoirs. According to Master Bibilia if one Arbitrator is missing, they can be replaced by another one, though they must meet the requirements of the missing one.

Origin
The place the Arbitrators in, is in another world isolated from the real world, but it's not an island. Only the Arbitrators themselves know where it's located, as well only them themselves can enter and leave the place, however if they wish so they can bring others only if the situation is dire. An Arbitrator can retire if they wish so as well.

Requirements
To become an Arbitrator, the mage must have incredible magic power inside them They must achieve their own representatives as well as attribute via their own will or by intensive training.

Paladin class mages can become one easily, hence their massive magic power, yet becoming one isn't very easy but their process is much faster than normal mages. Some Paladins can become an Arbitrator without doing anything or training if accepted. Famous Paladin such as Master Bibila and Master Liber are qualified as an Arbitrator.

To achieve the rank of an Arbitrator is also completely rare, since they can use abilities according to their attribute willingly, without the use of any kind of Grimoires. Mysteriously Arles Azazel become an Arbitrator when a star fell upon her.

A Trinity Seven is capable of becoming an Arbitrator, though they must perfect their own abilities to the limit, as well the chance is very rare and nearly impossible, but they can be chosen as a substitute if their is a missing Arbitrator or if one wishes to retire, even so the chance is still rare if not unacceptable.

Known Candidates:
Due to the Heavenly Arbitrator missing (which was Arles Azazel, whom she specialized in library studying) Master Bibilia had no choice but to bring the closest members of his school who are familiar with Arles line of work.
 * 1) Akio Fudo
 * 2) Selina Sherlock
 * 3) Mira Yamana

Although Akio doesn't count, as she was a substitute for Master Liber, since she wants to retire.