Denji is both brash and naïve as a result of being unable to have a formal education and socialize due to living in severe poverty. He comes off as rude and harsh in an almost childish way. However, he has a good sense of empathy. While transformed into Chainsaw Man, Denji becomes aggressive, bloodthirsty and sadistic. As the story progresses, it becomes more evident that Denji is emotionally damaged, and desperate to feel love and be loved by someone.