Contractor

Contractors (契約者, Keiyakusha) are a race of human-like beings that have unique, supernatural powers called, Contracts. The existence of Contractors is a secret kept by most world governments, but are well known to the higher ups in a government, as well as the word's criminal underground.

Overview
Ten years before the start of the series, two gates called Heaven's Gate and Hell's Gate appeared on the planet. With them, so did the beings called Contractors.

Contractors are logical beings, and seem devoid of emotion. For this reason, Contractors were often quite selfish and could be cold and ruthless. However, later in the series, it is revealed the Contractors are capable of feeling all emotions, however, these emotions do not play a prominent role in their everyday thought process. Because of this, they are described as both rational and amoral. A typical Contractor cares only about their well-being, and everything else is reduced to a cost or benefit analysis. Societal things like law, emotions, or even human lives are irrelevant to a Contractor. For this reason, Contractors feel no guilt, and are usually incapable of creating and maintaining social bonds.

The process in which a human becomes a Contractor is currently unknown, even to those who study Contractors. However, it is known that Contractors result from a defect that occurs when humans are unable to become Dolls.

Abilities
Contractors are unique for their emotional outlook on life, as well as their unique powers;


 * Contract: The unique ability each Contractor has.


 * Obeisance: The payment each Contractor must complete for the use of their abilities.

Transferring Abilities
In rare cases, Contractors have been known to pass their abilities on to a non-Contractor. These beings can use their Contract's without having to pay for it, and they aren't subject to the emotional changes of normal Contractors either. The only known cases of this happening are in Hei and Suou Pavlichenko.

Regressor
A regressor (喪失者 Sōshitsusha) is a Contractor that has lost their powers, becoming a normal human once again. They may regain their powers, however, if they get too close to Hell's Gate.