Denji is the main protagonist of Chainsaw Man. He is a poor, debt-ridden teenager who works as a Devil Hunter alongside the Chainsaw Devil Pochita before merging with him and becoming Chainsaw Man. Denji is impulsive, straightforward, and driven by simple desires, but he also shows surprising warmth and resilience. Throughout the series, he becomes a key figure in the conflict between devils, devil hunters, and larger hidden forces, growing from a desperate survivor into a central hero.