Asa Mitaka is a quiet and unsociable girl. She dislikes her classmates, frequently wishing they would drop dead and spurning any offers of friendship. She has a very negative outlook on the world, other humans, and Devils, and tends to assume the worst of others. She is, however, very fond of cats and would rather kill a human than a cat. Asa grew up with a loving mother whom she lost when they got attacked by the Typhoon Devil, her mother sacrificed herself to save Asa.