Each of the Study Guides have a character analysis section, here are a couple of examples:

Bob Ewell

An uncultured, uncouth, inherently evil character, who drinks up all the relief money, beats up his children, and has no qualms in resorting even to murder to restore his lost dignity among the community members.

http://www.pinkmonkey.com/booknotes/monkeynotes/pmToKill03.asp

Bob Ewell: Father of the bunch of Ewells who only attend school on the first day so the truancy lady will leave them alone. He is an alcoholic who poaches game to feed his family because he spends whatever money they have on booze. He accuses Tom Robinson of raping his daughter and has him thrown in jail, and although the whole town knows the Ewells are not to be trusted, Tom Robinson is convicted because he�s black.

http://www.bookrags.com/notes/tkm/CHR.htm

Student Study Guides:

These links will give you a summary of the book, character analysis, plot and much more, so that you will be able to answer literary questions.

http://www.pinkmonkey.com/booknotes/monkeynotes/pmToKill02.asp

http://www.gradesaver.com/classicnotes/titles/killmockingbird/

http://www.cliffsnotes.com/WileyCDA/LitNote/id-143.html

http://www.sparknotes.com/lit/mocking/

http://www.pinkmonkey.com/booknotes/barrons/mocking.asp

http://www.novelguide.com/tokillamockingbird/

http://www.bookwolf.com/Free_Booknotes/To_Kill_a_Mocking_Bird/to_kill_a_mocking_bird.html

http://www.awerty.com/tokill2.html

http://www.geocities.com/Athens/Troy/8866/mock.html

He hated Tom Robinson with a passion, and he was willing to let that passion drive him to the attempted murder of Atticus Finch’s children. (Atticus was defending Tom in court, and Bob apparently did not like that.) Of course, Bob’s hatred of Atticus literally proved his destruction.