Contract

A contract (契約, keiyaku) is the primary ability of a Contractor. In exchange for payment, a Contractor is given the ability to use a supernatural ability, unable to be used by normal humans.

Overview
Contracts came into existence on the same day that Heaven and Hell's Gate appeared on. Certain humans were given these abilities, and became known as Contractors. How humans are given contracts, thus turning them into Contractors, is currently unknown.

When in use, a Contract will cause its Contractor to gain a blue aura, known as "Lancelnopt synchotron radiation" as well as causing their eyes to glow red. Although it appears that Contractor can use small, instant uses of their power without the Lancelnop radiation showing, as demonstrated when Li uses a small jolt of electricity to fix his landlady's television when mistaken for the repair man and in the second season when April soaked a Russian bar owner's cigarette when he wasn't looking because he refused not to smoke. Use of a Contract also requires the Contractor to preform an obeisance; uncontrollable quirks caused by their ability.

Moratorium can also use contracts, though they do not have to pay Obeisance for them. In return, however, they cannot fully control their powers and will often revert into a Doll.

Whenever a Contractor uses their Contract, their star twinkles in the sky.