In this book is the main character the teacher, but the final fight is between the layers so the main characters are

Mr. Henry Drummond and Mr. Mathew Brady.

       Henry Drummond is a good guy, and he believes in freedom of speech and that’s why he arrived to the city of Hillsboro, because he thinks that freedom of speech is important.

       Matthew Brady is a guy, who was trying to be a president for three times, but he failed each time. He came to the city to sue him. I think that he did it because he want to show the people how the respecting the laws is important.