Denji is a young man with scruffy blond hair, sharp yellowish-brown eyes with bags underneath, and sharp teeth. After meeting the Chainsaw Devil, Pochita, he becomes a Devil Hunter in an attempt to clear his debt. Pochita fuses with his corpse, becoming his heart and setting a contract with Denji on the condition that he "share his dreams". After this, Denji revives and acquires the ability to transform into the devil-human hybrid known as Chainsaw Man by pulling a cord on his chest.