Alystia

Alystia, or Alys for short, is a Hero and Demon Slayer from the Clan of Light. Initially, Alys comes to the Human World in order to exterminate the surviving demons, including Amon Patricia. However, due to continuously turns into a child and can only turn back to her true form whenever she eats Kouichi Iruma's meal, she starts working at the Humming Dining instead.