Pochita is a small orange dog-like creature with a chainsaw protruding from in between his eyes. He's super cute and lovable but can actually become a pretty scary monster.
His story in "Chainsaw Man" begins with Denji, who uses Pochita to kill devils to pay off his debt to the Yakuza. Denji and Pochita fuse together after being betrayed and killed by their debtors. Pochita crawls inside Denji, replaces his heart, and brings him back to life, promising to keep him alive as long as he shows Pochita his dreams. Pochita allows Denji to transform into the Chainsaw Devil by pulling the string hanging from his chest. The Public Safety Devil Hunters force the duo to join them in exchange for their lives, and they spend their time using their chainsaw powers to kill devils.
Much of Pochita's history is shrouded in mystery, but the manga slowly reveals his backstory over the first few arcs. One of the first devils Denji encounters is noticeably terrified of his chainsaws and surprised they're still alive. After a televised fight, assassins travel to Tokyo to kill Denji, prompting him to question Pochita's past.
In a surprising revelation, Denji learns that Pochita is the notorious Chainsaw Devil, one of the strongest devils alive that can completely erase devils by devouring them. The Chainsaw Devil built a cult-like following in Hell, and Pochita's true form is a massive and deadlier version of Chainsaw Man. It turns out that The Chainsaw Man turned into the cute version of Pochita following a near-death experience that left him in a weakened state.
"Chainsaw Man" creator Tatsuki Fujimoto hilariously revealed at MAPPA's 10th Anniversary event what Pochita feels like, saying, "like a dry Marimo moss ball. Feels kind of like turf."
