Aki Hayakawa is a fictional character from the popular manga and anime series Chainsaw Man, created by Tatsuki Fujimoto. He serves as a Public Safety Devil Hunter, dedicated to fighting devils and protecting humanity. Aki is known for his serious demeanor and strong sense of duty, often putting the safety of others before his own. Aki possesses unique abilities, including the use of contracts with devils, which grant him special powers. His primary contract is with the Fox Devil, allowing him to summon its strength in battle. Throughout the series, Aki's character development explores themes of sacrifice, loss, and the complexities of human emotions.