In addition, as far as I am concerned, there are always two sides to everything.Even in the fairy, it also has its dark side.In this novel, from beginning to end, many, kinds of bias have been shown.For example, there are many ethnic conflicts between purebred wizards and mixed wizards.It also exists between muggles(people cannot use magic) and wizards.Even in different races, there are still some bias,such as between wizards and the giant, the house-elf, the goblins and so on.Purebred wizards discriminate mixed wizards and muggles.Muggles hunt wizards.They cannot catch a balance in their relationships.Even inside the school Hogwarts, the Slytherin is being elbowed out with other three colleges, especially the bias from the Gryffindor.

     As for the hero of this book, Harry•Potter has some prejudices with his professor Severus•Snape.It has been an essential clue to push the story forward throughout the novel.This article will analyze the professor Severus•Snape in different fields.I think that J•K Rowling shapes the professor Severus•Snape in a tragedy of the anti-hero instead of a villain.And by this charming role, we can realize more deeply about what is goodness and mercy in human nature.

2. Literature Review

There is no doubt that the series is a set of excellent children’s literature.The whole story consists of the growth of numerous characters.Different kinds of personalities live together and show us their destiny.They born, they laugh, they die, they cry.They tell us a fantasy story about love and human nature.

    The Harry Potter series have shown the readers a wonderful magic world.It also paints a vivid picture about these charming characters in our mind.The characters in the novel,as it were,play a vital role for the novel itself.It works a lot in the development of the plot and the expression of the author’s thought.In many study of Harry Potter,the characters in the novel study also became an indispensable part.The study of the characters in the novel is mainly focused on the characters themselves,character of the research,the backgrounds of the characters and so on.There are many different kinds of directions in the study of Harry Potter.As the hero of the novel,Harry Potter this character itself well embodies the spirit of courage and optimism.He is caring and loyalty of the friendship.When he is in the confusion and dilemma,he still holds beliefs of himself.Here are some information about the published study of Harry Potter.

Lana.A.Whited(2002),in The Ivory Tower and Harry Potter:Perspectivesona Literary Phenomenon,put forward that literary value should get all aspects of multi-level research.David G(2003) in Reading Harry Potter:Critical Essays Epstein analyzes the novel from the perspective of theory of the development of children,the history and social ethical perspective.Elizabeth E. Heilman（2003）,in Harry Potter's World: Multidisciplinary Critical Perspectives (Pedagogy and Popular Culture),proceed the study from the perspective of culture criticism and the readers’ response criticism.

What Harry Potter brings us is not only a kind of reading experience.At the present,the study of Harry Potter is mainly pided into two aspects.One,myth and archetypal criticism as the direction of the theme in the study, is devoted to prototype excavation works of the rich.The other is social criticism as the guidance, the evaluation work of design to gender, race, rights, and multicultural topics..As another important characters in the novel Harry Potter series, Snape is always a very important role throughout novels for the development of the story .Compared to the leading role of Harry Potter and the villain Voldemort's personality’s distinction, Snape's character is more complex, it has multiple characters, also let the reader of the story has a more rich experience.So far, both at home and abroad on snape's study also is less, also is not very system.We can say that in Harry Potter Snape's multiple character analysis has great practical significance, its to grasp the Harry Potter series of the novel's plot, characters, as well as the novel reflected values has a positive role in promoting.And today, for this subject at home and abroad is less, this also will help to further study on this subject.