Thesis statement:
Although the book shows only Harry’s journey to fight the dark lord, Harry would never have defeated him without the help of Hermoine.
Paragraph argument:
Hermione helps Harry to defeat the “Dark Lord” by using her knowledge from her books.
Link = how does this paragraph relate to your thesis statement?
Therefore, Hermione is extremely important for Harry Potter and Harry would not have been able to find the “Dark Lord” without her.