Nina

Nina is a Mii from the Switch.

Nina originally appeared as the Maker Mii for the 5 official Nintendo accounts in Super Mario Maker 2: NintendoUS, NintendoJP, NintendoEU, NintendoAU, and NintendoNM. She hasn't appeared in any game since. Obtaining her Mii data file is possible via several methods, but the easiest is to use an API to access the Mii stored in the user data.

Her Mii name in her Mii data file is ニナ ("Nina"). Her height is set to 83/127 and her build is set to 40/127. Her Mii ID is as follows: 5B C1 3D EB 0A 46 43 ED A2 4E 5E 54 F2 F4 40 27

Her Mii data file contains unused data. Her mustache is set to be sized 4 larger (maximum) and moved 6 down (lowest). This may be leftover from a potential earlier design for the character. Additionally, her favorite color is yellow, which can not be seen in Super Mario Maker 2. In the game, she wears the default red Nintendo shirt, thus making her favorite color go unused.

Information

Nina breaks rule 3.1.1.b in the Mii face rules laid out in the Guide to Using Official Accounts in Miiverse where it explains official Miis must not use parts in ways other than the intended function. In Nina's case, she's using eyebrows to represent strands of hair poking up from the top of her head.

Nina has a regular human design as well (see image gallery), and this is how she appears throughout most of the game. She appears as this design in Yamamura's Dojo, which has in-game tutorials led by Nina and Yamamura. She pops up generally around many helpful menu options, as she is meant to help new players understand the game better.
However, as all Makers in the game require a Mii attached to the account, the official Nintendo accounts were no exception. Unlike the first Super Mario Maker game, which used 2D artwork instead of displaying the Miis tied to the accounts, Nintendo decided to go with a Nina Mii to represent all five official accounts. So, while the Miis tied to official accounts in the first game are normally unseen by the player, Nina's Mii is displayed as normal.

Despite the same exact Mii being used across all five official Makers, with each account meant to represent a different world region, the Mii name is never seen in-game, allowing it to be in Japanese no matter the language it's representing. Considering the Mii name is in Japanese, this likely means the Mii was created by the Super Mario Maker 2 development team, and then sent to the four other groups who would be handling the Maker accounts in other regions.

Image Gallery

Outside of her human artwork, Nina's Mii does not appear in any promotional artwork. Below is a screenshot of Super Mario Maker 2's Yamamura's Dojo > Maker Lessons > Intermediate > Treating the Player Fairly.

Switch Recreation Instructions

Here's how to recreate this Mii on the Switch:

Names in Other Languages

English: Nina

French: Nina

Spanish: Nina

Japanese: ニナ ("Nina") (Same as in Mii data file)

Chinese: 妮娜 ("Nina")

Source: mariowiki.com