As a first little note, it's intentional that there's little info on each of the ruling nations at the moment. It'll be filled in more as the story progresses. As a result of this, though, you may feel free to expand upon bits of the world within reason. Things like making up towns or cities where your character may have been born or lived in, as long as they fit the general theme of the area, is totally fine and even encouraged!

I also don't want anyone to feel like they [i]need[/i] to be a mage to be powerful, as things like special items will be found throughout the story as well that non-mages could use. Just as well, due to this still being anime in essence, over the top physical feats will be something you could aim for.