Mayella Violet Ewell is the daughter of Bob Ewell in the 1960/1962 novel/film To Kill A Mockingbird. Despite her not being the story's main antagonist, she is regarded as one of them due to claiming she was raped by Tom Robinson when instead she had likely been abused by her father.
Mayella is the eldest daughter of Bob Ewell, and thus ends up having to take care of her siblings because her father is a strong alcoholic. She is physically abused by her father and becomes confused while testifying at the trial because Atticus asks her if she has any friends; she does not know what a "friend" really is. She wants a much better life, with nothing exciting to do.