Denji, a Chainsaw Devil, serves Makima, the secretive Control Devil. In Tokyo, Denji lives with fellow Devil Hunters: Power, Aki, Himeno, and Angel. Power, a Blood Fiend, inhabits a young girl's body with blonde hair, yellow eyes, and red horns. Aki wields a lifespan-draining katana, donning a black suit, tied hair, and blue eyes. Aki and Himeno share a secret romance.