Who is Ron Weasley from Harry Potter and the Deathly Hallows and what is their importance?

Ron Weasly is Harry's best friend. Like Harry, he is from the House of Gryffindor. Ron is the youngest of five boys and has a younger sister, Ginny. He is very protective of Ginny, who is dating Harry. He warns Harry to stay away because he doesn't want to see his sister heartbroken.