An Amazon nation in the Cosmic Era
The Reposians, unlike the rest of Atheus, respect rather than fear the sea. In fact, this respect has grown to border on love and dependence. It is a fact, naturally, that most of Reposian exports are seafoods, and most of its income is from sea-based reasons, from oceanic trading vessels to fish.
The Sanguis Islands is an archipelago nation. Dangerous to sail through them, the people who live there are self-sufficient, independant, stuborn, and resilient.
A small, primitive village has yet to discover fire, which is a good thing because there are highly flammable (but not otherwise dangerous) gasses in the air. The heroes, blissful in their ignorance, don't know that and think it a wonderful idea to show the locals open flame.