Ruby Oliver is a fictional character from the young adult novel series written by Sarah Dessen. She is a high school student navigating the complexities of friendships, love, and self-identity. The series explores her experiences and challenges as she deals with the ups and downs of teenage life. The first book, titled "The Boyfriend List," introduces Ruby as she reflects on her past relationships and the impact they have on her present. Throughout the series, Ruby learns valuable lessons about trust, loyalty, and the importance of being true to oneself while growing up in a vibrant, relatable world.