The other outfit that they keep teasing us with is one that has been used for various minor characters during Endwalker – sort of a revamped version of the male Riviera set with a shirt and vest, loose pants, buckled ankle-boots and possibly either a bandana or new glasses design as the headgear. It has a piratey vibe and would have made a nice gift from either MSQ or the final Island Sanctuary step (or added to its shop).
For an example of the full set, there's a blonde Highlander woman standing next to a ship on the middle pier at Sharlayan's harbour. (If you've finished 6.55 MSQ, she's close to where G'raha is currently standing.)
For the possible headpieces, the ferry ticketer also at Sharlayan harbour is wearing the shirt with a bandana I don't recognise, and in Radz-at-Han the Pandæmonium relic trader Djole is wearing glasses that look like the Varsity design but without the hat.
