Two main characters of ‘Lord of flies’  are Ralph and Jack.  In my opinion, the cruelest character of the novel is Jack.  He is antagonist of the story. Jack is charismatic in a cruel way. Ordering the choir to stand, they are “wearily obedient.” Soon, Jack asserts himself with “arrogance”: “‘I ought to be chief,’ Thus begins the conflict between good in the character of Ralph and evil in the character of Jack in Golding’s allegory.  Jack represents evil and violence, the dark side of human nature. Also we can call Roger another evil character of the novel because  he was Jack’s “lieutenant.” A sadistic, cruel older boy who brutalizes the littluns and eventually murders Piggy by rolling a boulder onto him.