What character displays courage in Part 2 of To Kill a Mockingbird?

In Chapter 15, Jem displays courage by refusing to leave Atticus alone at the jail-house when the Old Sarum bunch arrives. The day before Tom Robinson's trial, Atticus decides to drive to the Maycomb jail-house and sit outside Tom Robinson's cell. Jem, who is at home, decides to leave and find Atticus to make sure he is alright. As Atticus is reading outside Tom Robinson's cell, four cars arrive from the Meridan highway. The men who get out of the cars are part of the Old Sarum bunch. Walter Cunningham is the leader of this 'mob,' and plans on harming Tom Robinson. Jem, who is hiding out of sight with Scout and Dill, watches as the men surround Atticus. After Scout runs into the circle of men, Jem walks out his hiding place. Atticus tells Jem to "go home," but Jem refuses to leave. One of the men from the mob grab Jem by his collar and says, "I'll send him home." (Lee 203) After Scout kicks the man, he lets Jem go, and Atticus continues telling Jem to leave. Jem displays his courage by choosing to stay and stand up for his father during a dangerous situation.