Throughout the book, the character who changed the most was Benson Fisher. At the beginning of the story, he was a typical teenager. Towards the middle of the book, he became more emotional, in the sense that he wanted to escape from the razor-wire fence surrounding the school. And finally, in the end of the book, Benson seemed to become more aggressive, like he would do anything to save himself and his friends.
Here are the reasons I think he changed:
Benson realized that escape from this school was going to be almost impossible
Benson saw his friend rip her ear off uncontrollably
Benson experienced getting beaten by a robot-possessed human
In my opinion, Lillian Paterson was a minor character that had major importance in the story. Lillian (Lily) was a character that died trying to escape from Maxfield Academy. It was said that she was run over by a car while she was crossing the nearest highway; 50 miles from Maxfield. Lily was an important character in this story because she was one of the first students who tried and succeeded in crossing the brick wall surrounding the school. Lily was mentioned throughout the story as being a brave, courageous girl who dreamed of accomplishing a near-impossible feat.
Benson's friend that he flees out of the school with at the end of the book.
The treacherous school that Benson and his friends
Locked up Inside
This prisoner's time in jail is like Benson's time in Maxfield Academy. Locked up, lost, desperate, and scared.