who is beneatha?

Walter's 20-year-old sister, a college student who invades the Younger household with her modern ideas and philosophies on race, class, and religion. She is a handsome intellectual who has worked hard to refine her speech. Played by Diana Sands in the original Broadway production. This info. is right out of this site. Check it out on the source link, it will help with all you need to know!