Nikki is the host of Nintendo Swapnote (or Nintendo Letter Box). She is a female Mii who provides the player with various hint letters after they complete certain achievements. Nikki is generally known as the star of Swapnote. After Swapnote discontinued, Nikki appears in her own section in the Japanese Nintendo News, as well as the European Nintendo Extra.
Nikki has a yellow pet cat named Cat and a panda friend named Panda.
- Nikki cannot swim on her own.
- The name "Nikki" means "Journal" or "Diary" in japanese