in the book The Faults in our Stars the two main characters are very different. Hazel is looking on the downside of cancer and she is always acting like she is going to die. Gus is very optimistic and try's to do everything. He try's not to focus on the downside of cancer and he try's to live life to the fullest. Hazel try's to do things that she knows she can't do, and so does Gus. This is one of their similarities. Hazel always dreams about things she wants to do. On the other hand, Gus arranges and makes the things hazel wants to do happen. One example of this is that hazel dreamed of meeting the author of one of her favorite books. Gus emailed him and the author got them plane tickets and a hotel for their stay in Amsterdam. I am only halfway into the book, so I don't know everything about the characters yet.