Most of the characters in this novel face injustice in one way or another. Here is a brief example for several characters, to get you started on the right path:
Scout - Scout does a lot of "growing up" in this novel. She doesn't understand much about the world in the beginning, and by the end she understands a little too much. Scout's ignorance shows in her interaction with the new teacher in school, Walter Cunningham, her aunt, and the townspeople. She deals with injustice with childlike innocence, as seen through the scene where she single-handedly disbands a lynch mob. It is that same childlike innocence that helps her cope with the injustice, and move on in a positive direction.
Jem - it is hard for Jem to deal with the trial, in particular. He is old enough to understand what is happening, and to see the logic of the situation (that Tom is innocent and Mr. Ewell is the guilty party). But he is young enough that he doesn't understand the racism that lies beneath; he cannot comprehend why the jury would convict Tom, or how justice could not be served in this case. So he has a harder time dealing with these things than some of the other characters, both because of his age and also because of his closeness to his father, who is on the "front lines" of the injustice in the trial.
Dill - after the verdict comes in, Dill reacts physically. When Dolphus Raymond meets him, he sees a kindred spirit in Dill, and understands why it was so hard for Dill to experience the injustice of the trial.
Atticus - Just like with everything else, Atticus approaches injustice with a level head. He tries to keep the law in mind, and yet also manages to balance the delicate nature of the community. He presents the facts in the trial without accusing anyone of racism or bias. He accepts the case knowing what kind of trouble it will cause, simply because it is the right thing to do. Even though the trial does not go the way he wanted it to, Atticus is able to fight another day, hoping that some eyes were opened and some tables will begin to turn.
Boo Radley - Boo has his own brand of justice. After enduring years of abuse from his father, Boo takes matters into his own hands and stabs his father. Later, as an adult, he comes out of hiding to dole out justice to Bob Ewell, who is trying to hurt the children Boo has come to know and love from his window. After this incident, justice would be served if Boo were given credit for his heroism, but it would also be an injustice in a way to drag him into the spotlight where he doesn't want to be. So, he is able to go back to his life, and "his children" can grow up and live safely for another day.
i thx alot this really help i need on more for tom robinson and can u also help me get qoutes for atticus and Boo radely that proves the point. thankyouu soo much