Hirokazu Arai is a side character in the anime series Chainsaw Man. He is a Public Safety Devil Hunter, working in Division 4. Arai is depicted as a kind and somewhat timid individual, often showing concern for his teammates. Despite his initial hesitance, he displays bravery in the face of danger, demonstrating a strong sense of duty. Arai's character serves to highlight the harsh realities of the devil-hunting world and provides emotional depth to the series through his interactions and development.