Casey Cartwright is the lead female protagonist of the series. She is the older sister of Rusty Cartwright. Along with being very smart, she is also very social and popular, unlike her brother. She is the best friend of Ashleigh Howard. She served as rush chair, pledge educator, interim president, and house mother at the Cyprus-Rhodes Universtiy chapter of Zeta Beta Zeta. Also during her time at ZBZ, Casey was the little sister of Frannie Morgan and big sister of Rebecca Logan. By the end of series, she is the girlfriend/ future wife of Cappie, her first love, and is leaving with him to live in Washington, D.C.