Ruby Maxwell is Nikki's mean older sister appearing in the 2003 Warner Bros. Animation series: The Dork Diaries. She has long brown hair and green eyes. Her main outfit (as shown in the television series) is composed of: a black long sleeved shirt, black skirt, fishnet pantyhose and black boots. She is voiced by Candi Milo (who earlier voices Lori Blake from Hoop-a-Joop). At her age, she is 17 years old.
- Elizabeth Maxwell (Mother)
- Albert Maxwell (Father)
- Nikki Maxwell (Younger Sister)
- Brianna Maxwell (Youngest Sister)
- David Fazio (from Jeff and Taylor 2003, Love Interest)