Denji, also known as Chainsaw Man, is the protagonist of the manga series. Initially living a bleak life as a devil hunter, Denji forms a contract with Pochita, a devil in the form of a chainsaw-dog, and becomes a hybrid between human and devil. Denji wields immense chainsaw-like powers and becomes an agent for the Public Safety Devil Hunters. He is driven by simple desires and seeks to enjoy life's simple pleasures amidst the chaos and dangers he faces.