Pookie is a Mii from the Switch.
Pookie originally appeared as the default Mii for the Greenhorne town's Lovey-Dovey Couple (Woman) role in Miitopia (Switch, Demo). She later appeared in the full game of Miitopia (Switch). Once the player replaces her with a Mii of their choice, Pookie 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 Town00_CoupleF.charinfo.
Her Mii name in her Mii data file is ラブおんな, which translates to "love girl". Her height is set to 93. Her Mii ID is as follows: 04 1D 39 30 6D B3 46 E4 A3 70 1B D9 19 54 38 72
Her Mii data file does not contain any unused Mii data.
Pookie's role in Miitopia (the Lovey-Dovey Couple (Woman)) is described as so:
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 Pookie 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. Pookie's name on the Mii Library is going off of the US English version, for consistency. A chart containing all of Pookie's names is located at the bottom of this page.
Pookie unfortunately does not appear in any promo art. Below is a screenshot of her in-game as her role in Miitopia.
While Pookie 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 Pop Star (bow) job. The USA and JPN versions of the promo art are also slightly different, so both have been included here, but Pookie seems to be based on the JPN version. 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
Source: Miitopia (Switch, Demo)