Helen (Switch) originally appeared as the default Mii for the Greenhorne town's Worried Mother 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, Helen 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_Mother.charinfo.
Her Mii name in her Mii data file is しんぱい, which translates to "worry". Her height is set to 50 and her build is set to 86. Her Mii ID is as follows: 58 E1 D1 44 D2 2D 4B 9A BC DA 8E 85 C0 91 E5 F9
Her Mii data file does not contain any unused Mii data.
Helen (Switch)'s role in Miitopia (the Worried Mother) is described as so:
She seems to bear resemblance to Se-young, as it seems a handful of the Miitopia Switch default Miis were based around Wii U/3DS CPU Miis, but there are still visible differences between Helen (Switch) and Se-young.
The names of the default Miis in Miitopia Switch often vary drastically depending on region. Helen (Switch)'s name on the Mii Library is going off of the US English version, for consistency. A chart containing all of Helen's names is located at the bottom of this page.
Helen (Switch) unfortunately does not appear in any promo art. Below is a screenshot of her in-game as her role in Miitopia.
This Mii originally appeared on the Switch!
Here's how to recreate them on the Switch:
Names in other languages
Source: Miitopia (Switch, Demo)