Asa Mitaka, the Academy Saga protagonist, is a high school student with twin-tailed black hair and brown eyes. She becomes the host of War Devil Yoru, retaining her human personality. Despite her initial unsociability, trust issues, and low self-esteem, she becomes a skilled devil hunter driven by her motivation to save Chainsaw Man, while attending Fourth East High School. She is intelligent, usually talking too much when it comes to stating information.