She is a Muggle-born Gryffindor, who becomes best friends with Harry Potter and Ron Weasley.

As per J.K Rowling, she was born on 19 September 1979, and she was nearly twelve when she first attended Hogwarts. Emma Watson has played the role of this super active young teen in the movie.

Harry Potter series, by far, is one of the best book adaptation, managed to bring all the elements in real life, but everything cannot be perfect. There are ten things about Hermione, which are lil twisted and changed.

• She isn’t that cool all the time as per book and movie; she is one of the smartest witches and quickest thinkers in the world. But as per the book, she is not that cool-headed and does panic at times.
• In the movie, she is ok and comfortable in calling Voldemort by his name, whereas in the book, Hermione didn’t become comfortable in saying his name out loud for at least some time.
• In the movie, she is shown far more attractive compared to the book. As per the book description, she has big teeth, voluminous hair as a teenager. 
•  When the trio breaks into Bellatrix Lestrange’s vault and needs to make a quick exit out of Gringotts and rides on the back of a dragon. In the movie, it is Hermione’s idea, whereas, in the book, it is Harry who suggests the idea as Hermione hates flying.
• There are many heroic moments in the book primarily related to Ron Weasley, but in one of the scenes, Hermione is coming as a human shield for Harry in Prisoner of Azkaban instead of Ron.

• In the book, all three main characters are shown well balanced, but in the movie adaptation, Ron is shown in comic characterization. All three characters have got different characteristics.
• In the movie, Hermione narrates the story of a link between the movie and the audience.
• Mudblood is a word unknown to Hermione in the book, and Ron explains the meaning to her. In the movie, she takes it as an offense when called by the name by Draco.
• She knows too much about wizarding culture in the movie, and in the book, its Ron who explains about it to both of them.
• She is shown too perfect in the movie, and fans are Lil disappointed with such a change in her character.