Denji (デンジ?) is the titular protagonist of the Chainsaw Man manga and anime series. He is the main protagonist of the Public Safety Saga and the deuteragonist of the Academy Saga.
As a young boy, he inherits his father's debts from the Yakuza. After meeting Pochita, he becomes a Devil Hunter for the Yakuza in an attempt to clear his debt. Once the Yakuza, under the control of a Devil, betrays him, he dies and Pochita becomes his heart. He is then revived and can become the Chainsaw Man...