Tan outfit, pith helmet, that sort of thing. A classic late 19th & early 20th century look for an explorer/safari hunter/adventurer type, maybe someone who went exploring in the Ixian realms. An Alan Quatermain-esque sort of character. Seems like it would be a great fit for the style this game is going for.
Some examples from google images (and halloween costumes lol):
Some examples from google images (and halloween costumes lol):
