Reese is a Mii from the Switch.
Reese originally appeared as the default Mii for the Scholarly Pioneer role in the files of Miitopia (Switch, Demo), but unused within the demo itself. She later appeared in the full game of Miitopia (Switch). Once the player replaces her with a Mii of their choice, Reese would never appear again, unless that Mii is deleted. Her Mii data file can be found in \cmn\storedata\npc_default_mii.sarc and is named Investigator.charinfo.
Her Mii name in her Mii data file is ミステリー, which translates to "mystery". Her height is set to 67 and her build is set to 42. Her Mii ID is as follows: 01 96 39 6A 2D EC 43 91 B2 75 CA 7A BF 94 9F BF
Her Mii data file does not contain any unused Mii data.
Reese's role in Miitopia (the Scholarly Pioneer) is described as so:
Travels Miitopia in search of uncharted
lands. Enthusiastic, to say the least.
She seems to bear resemblance to a Mii featured in Miitopia (3DS) promo art, as it seems a handful of the Miitopia Switch default Miis were based around Miis that appeared in promo art for the original game, but it's unconfirmed if Reese and the promo art Mii are meant to be the same character.
The names of the default Miis in Miitopia Switch often vary drastically depending on region. Reese's name on the Mii Library is going off of the US English version, for consistency. A chart containing all of Reese's names is located at the bottom of this page.
Reese unfortunately does not appear in any promo art. Below is a screenshot of her in-game as her role in Miitopia.
While Reese herself does not appear in any official promo art, a very similar Mii does appear in promo art for Miitopia (3DS), where she's given the Mage job. Note differences in her design, like hair color.
This Mii originally appeared on the Switch!
Here's how to recreate them on the Switch:
Names in other languages
US English: Reese (phonetic pun on the first half of the word "research")
US French: Laura
US Spanish: Lara Sagaz
EU English: Lara
EU Dutch: Lara
EU French: Laura
EU German: Lara
EU Italian: Lara
EU Spanish: Lara Sagaz
JP Japanese: リサ (Translates to "Risa", phonetic pun on the first half of the word "research")
KR Korean: Reese
CN Chinese: Reese
TW Chinese: Reese
Source: Miitopia (Switch, Demo)
Mii Studio code
Unfortunately, as the Switch no longer supports QR codes, the only way to obtain this Mii yourself directly is via importing them into your Mii Studio with this tool.
This is Reese's Mii Studio code:
You can download Reese's charinfo-format Mii data file here.