Boo Radley and Father: Boo's father hid Boo Radley away after he got arrested . So, then Boo stabbed his father with scissors.
Atticus and the Mob: The mob of white people consider Atticus as a traitor for defending a black man. The mobs' goal was to hurt Tom Robinson but Scout got them to leave.
Dill: Dill is the child that doesn't get attention at home. He's jealous of the attention that the Finch kids get. Dill wants to get closer to the kids so he can feel that family love. He always lies and runs away showing the struggles he faces at home.