The main character in a story is called a(n)

the protagonist

Explanation:

Protagonist:  The main character of the story. This is the character who experiences the main conflict and has to solve it.  It is the character driving the story.  The character can be good or evil.

rudy is the nazi ideal, unfortunately for the nazis his ideal comes in the form of jesse the complete opposite of those who embrace the idea of white supremacy. over the course of the novel, rudy learns that he wants nothing to do with the hitler youth, and because of this his parents are forced to make a bargain; rudy's father is forced into the military, so that his son can remain home.   both liesel and hans influence that young man that rudy becomes. following han's example, rudy puts aside his own hunger to risk his life so that the jewish prisoners might have bread to eat.