
Suss originally was set as the default Mii for Neksdor Town's Shady Merchant Father role in the demo for Miitopia (Switch), unused as the demo ends before reaching Greenhorne Castle. 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.
Suss's role in Miitopia, the Shady Merchant Father, is described as so:
He bears resemblance to a Mii featured in Miitopia (3DS) promotional art, as it seems several 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 Suss also appears in promotional art for Miitopia (3DS), where he's a hero given the Thief job.

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:
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TW Chinese:
Source: Miitopia (Switch)
This is Suss's Mii Studio code:
You can download Suss's charinfo-format Mii data file here: charinfo