Nikki

Nikki is the mascot Mii in Swapnote who gives you tips and rewards every now and then. When you download the Swapnote application from Nintendo eShop, Nikki is added to your Mii collection in StreetPass Mii Plaza. She has since mostly been featured in Nintendo's other applications but has made a few appearances in Nintendo's bigger games like Super Smash Bros. Ultimate or Super Mario Maker.

Nikki could be a Japanese-American, as her name, while definitely Japanese, also fits as American; her name in Japanese means "diary" (日記, にっき, Nikki) and in America, her name could be short for Nicole as the shortened variation, which would fit as the name Nikki was invented in America as a shortened variation of Nichole. The name Nicole is of french origin, and it means "Victory Of The People". Nikki's name is officially written as ニッキー in Japanese.

She seems to be even-tempered, always bouncy and cheerful, calm and determined. She tries to make you feel like there is always someone there for you. She sent you letters regularly which contain important information and updates. She likes to spend a lot of her time reading, writing and spelling at school, but isn't very good at something that she hasn't done before.

She and Botan (teenage self) are the shortest of all Miis whose age category is Teen, at 46.