In chapter 17, during Scout's narration to readers, she reveals an oddity about Mayella:
One corner of the yard, though, bewildered Maycomb. Against the fence, in a line, were six chipped-enamel slop jars holding brilliant red geraniums, cared for as tenderly as if they belonged to Miss Maudie Atkinson, had Miss Maudie deigned to permit a geranium on her premises. People said they were Mayella Ewell's.
This quote might fit nicely into your paper as around this quote Scout describes the Ewell family's home. It is filthy and dirty and gross. Any humane person would long to get out, or long to have pride in something, or long for cleanliness. These red geraniums demonstrate these longings in Mayella. She wants to escape the filth that terrorizes her life every day.
In chapter 18, Mayella's time on the stand reveals even more about her personality and hardships:
"What did your father see in the window, the crime of rape or the best defense to it? Why don't you tell the truth, child, didn't Bob Ewell beat you up?"
When Atticus turned away from Mayella he looked like his stomach hurt, but Mayella's face was a mixture of terror and fury.
Atticus is asking Mayella who really beat her. The "mixture of terror and fury" demonstrates that she is angry with Atticus for asking, but the terror shows that there may be a more than likely chance that he is completely correct to make the assumption he does. It would be quite a hardship to endure defending a man who hurts you.
Moments later, Mayella reveals her strength even in the midst of weakness:
Suddenly Mayella became articulate. "I got somethin' to say," she said. Atticus raised his head. "Do you want to tell us what happened?"
But she did not hear the compassion in his invitation. "I got somethin' to say an' then I ain't gonna say no more. That nigger yonder took advantage of me an' if you fine fancy gentlemen don't wanta do nothin' about it then you're all yellow stinkin' cowards, stinkin' cowards, the lot of you. Your fancy airs don't come to nothin-your ma'amin' and Miss Mayellerin' don't come to nothin', Mr. Finch."
She yells at the audience, declaring how things are going to be (strength), but she can't see Atticus's manners for what they are worth. Therefore, she demonstrates her simple-minded inability to identify common courtesy. She uses mean names to present herself as tough, but she comes across as weak.