How do I woik with a difficult female co-worker who acts like a "high cl red neck?"?

I am the new girl in the office with six new female co-workers, five of them are professional, helpful, courteous, and treat me as an equal. All our jobs are clearly defined, so there is no confusion about who is doing what. However, female #6 appears to be "the one to cop an attitude." For lack of a better way to describe her, she is abrasive, condescending, opinionated to the point of being argumentative and shows no cl or professionalism in her demeanor. Even though she drives a hummer, dresses with designer clothes and jewelry, and talks about trips to the summer house, or her "upscale lifestyle", she just acts like a "high-cl redneck". She acts like someone who has not had an education or a lesson or two in charm school. I will be working with her on cases (our bosses will be working together often) and I do really want to have a good working relationship with her. I don't want to offend her, just work with her. Suggestions?