2 Main Characters?

Since the book is written in first person, the author, George J. Trebonyak, “Trek” is clearly one of the main characters along with Newt (the book doesn’t state his real name.)  Trebonyak and Newt are two completely different soldiers.  Trek is a warmhearted individual, and Newt, on the other hand, is coldhearted. In the book, when the Germans, or the enemies, surrendered, or were shot, Trek would stop shooting and get a medic.  However, Newt would continue shooting or just leave them there to die.  Trebonyak and Newt develop an unbreakable bond throughout the story, starting when they met at camp, and were placed in the same platoon.