Junko Hattori is a student of class 1-A and the class representative. She is a disciple of the god Suhara and a member of the Hattori Clan, a samurai-like clan of ninja warriors charged with protecting the Empire for generations. She is very devoted to her traditions and has a strong sense of justice. She meets Akuto on the train to the school, and forms a pact with him to make the world a better place. When she discovers that he is destined to become Demon King, she decides that it is in the best interest of society to destroy him, believing that he knew about his destiny and that he tricked her into becoming friends. She usually misinterprets his attempts at good deeds and intentions as evil wrongdoings.
Source from Wikipeida