Devil Hunter

Devil Hunters are individuals (human or otherwise) who, as the name would imply, have taken it upon themselves to fight against Devils whenever a threat related to them should arise in the world. They tend to use contracts with Devils as means of standing a chance in combat against their monstrous opponents, giving them a massive advantage over standard law enforcement when Devils should appear.

Due to Denji's role as a Devil Hunter in both the Private Sector and Public Safety, they play a pivotal role in the story of Chainsaw Man.

Public Safety Devil Hunters
The Public Safety Devil Hunters are an organization of government-sanctioned Devil Hunters in Japan who function similarly to a Fire Department or Police Force. They're sent to dispatch Devils in the event of a threat to the public and are tasked with resolving devil-related incidents on a smaller scale. Though the threat level of the Devils they pursue can vary, they're generally sent after bigger threats than those working in the Private Sector, according to Himeno.

Public Safety Devil Hunters are split into several different divisions. A notable division of Public Safety Devil Hunters lead by Makima employs individuals who are outliers to most of the organization at large, such as Denji, a living human who previously fused with a Devil and Power, a fiend.

Private Sector Devil Hunters
These Devil Hunters work on their own or in groups with other private devil hunters. They are similar to bounty hunters and freelancers, meaning that they are not loyal nor officially employed by any government. They are sometimes also given work by the Public Sector for a certain amount of time. They usually get paid the price of the bounty on the specific devil which they capture or kill, however they usually are sent after smaller threats than the Public Safety Devil Hunters, likely because they have less resources and safety due to being self-employed.

It is considered an obstruction of justice when a Public Safety Devil Hunter kills a devil which a Private Sector Devil Hunter is already engaged with, this can lead to the Public Safety Devil Hunter being arrested.