Nikki Maxwell is the main protagonist, the older sister of Brianna and the love interest of Greg Heffley appearing in The Dork Diaries. She has brown hair and green eyes. Her main outfit (as in her updated profile) is composed of: a pink short sleeved shirt, two yellow bracelets on her wrists, blue skirt, tan pantyhose and red flats. She is voiced by Kelly Sheridan. At her age, she is 14 years old.
- Elizabeth and Albert Maxwell (Parents)
- Brianna Maxwell (Younger Sister)
- Greg Heffley (Love Interest)
- Mackenzie Hollister (Rival)
- ??? Greg
- ??? Chloe and Zoey
- ??? Mackenzie ???