Rally-ho!

The t-shirt was a reveal for a new job, perhaps beastmaster or some hunter-type job. the Viera is a red herring. We'll need weapons to fight the Garleans and who forge the best weapons? Dwarves.

But I reckon we'll meet them once we pass through The Burn. If you follow the world map, North of the Burn, which is accessible once you've passed through it are some grey mountains, which I bet has one called Mount Duergar, as a reference to FF1, where the dwarves live. Once the Warrior of Light goes through the burn, they will need respite, so it make sense to have a settlement placed there. You may be onto something here.