 As such, Contractors are usually identified by their star's Messier catalogue number.Kept secret from the masses, these individuals are known to murder in cold blood, smothering unnecessary emotions with logic and rationality.Their incredible abilities, however, are gained at the cost of their humanity; Contractors are thus named because of an involuntary compulsion to "pay the price" each time their power is used, which can range from eating particular foods or completing meaningless tasks, to self-harm or changing their bodies in peculiar ways.