Brianna Maxwell is Nikki and Ruby's younger sister appearing in the 2003 Warner Bros. Animation series: The Dork Diaries. She has brown hair and green eyes. Her main outfit (as shown in the television series) is composed of: a blue short sleeved dress and black high heels. She is voiced by Grey DeLisle (who is also the voice of this Kick Buttowski character of the same name Brianna Buttowski). At her age, she is 6 years old.
- Elizabeth Maxwell (Mother)
- Albert Maxwell (Father)
- Nikki Maxwell (Older Sister)
- Ruby Maxwell (Oldest Sister)
- Bowser Jr. (from Super Mario Adventures 2003, Love Interest)