Jace originally appeared as the default Mii for the Prince from a Nearby Land role in the files of the demo for Miitopia (Switch), unused. He later appeared in the full game. His Mii data file can be found in
His Mii name in his Mii data file is
His Mii data file does not contain any unused data.
Jace's role in Miitopia, the Prince from a Nearby Land, is described as so:
fiancé. Arrogant, but loves his mama.
He bears resemblance to a Mii featured in Miitopia (3DS) promotional art, as it seems many of the Miitopia (Switch) Miis do, but without the original Mii data for the Miitopia (3DS) Mii, it's difficult to pick apart differences between the two.
A Mii resembling Jace also appears in promotional art for Miitopia (3DS), where he's also assigned the Prince from a Nearby Land role.
Below is a screenshot of him in-game as his role in Miitopia.
Here's how to recreate this Mii on the Switch:
US English:
US French:
US Spanish:
EU English:
EU French:
EU Spanish:
EU German:
EU Italian:
EU Dutch:
JP Japanese:
KR Korean:
CN Chinese:
TW Chinese:
Source: Miitopia (Switch)
This is Jace's Mii Studio code:
You can download Jace's charinfo-format Mii data file here: charinfo