A heavily fortified city, Caleria is an heavily trafficked trading center, thanks to its geographical position, placed at the border of Harmonia, the Dunan Republic and the Grasslands. However, despite the heavy traffic and the large population of the city, most of the city's residents live in poverty. Given its location, the political situation around the area can be somewhat delicate, and the Harmonian Southern Frontier Defense Force headquarters are located in this area. Due to the large amount of traffic from many nations, it is also a place where valuable information, along with goods, may be purchased.