Outset vs 原初.

Soh's Outset outfit is called ' 原初' in Japanese.

Primodial; primeval; origin; source; beginning; starting point.

The most accurate synonym for "outset" when referring to the beginning or start of something is "inception". Other synonyms include "start," "commencement," or "beginning." For "primordial," which means existing at or from the beginning of time or something, synonyms include "primeval," "primal," "primitive," or "ancient." 

Hmmm. Similar but not exactly the same? I'll trust the translator's decision.
The name Outset stands out.

I suspect it's the first outfit created for her. I'm glad they changed it.