[@Lurking Shadow] Sorry it took so long but I needed a computer to type this out on.  

I’m still writing out the details but two of the three countries are more or less European inspired. The larger of those also includes regions with people of a variety of ethnic groups after conquering most of its surrounding area. I put it under the medieval tag because of the level of technology the vast majority live with and the traditions they follow. Majority of those two countries are considered monotheistic however there is a good percentage of nontheistic people as well. There will always be zealots but overall it is thought that combining politics and religion is corruptive to both of those things. Their ultimate goal was to gain power, land, and resources. Converting others to their main religion was the business of priests and only for those who wish it.  There are some local disputes and differences in beliefs that cause disagreements but for the most part the country is led and managed competently. The smaller one was a former ally they tried to conquer but failed because of their ability to defend their borders along with geography making things difficult. The third country is kind of inspired by feudal Japan with other stuff. The land is broken up between the major families. There is an emperor but most political power is given to the heads of the families due to decades of meddling. There isn’t any fighting now but rivalries and attempts to gain influence makes tensions rise so they’re on the edge of conflict. 

I usually wait until I understand the characters before making a list of potential directions the plot could take.

So far I have religion-based magic, tradition-based magic, and item-based magic. The first two humans can learn but it takes time to study and practice. Usually, it’s things like limited healing, barriers, visions of the future, and protection spells and the like. Sometimes a strong demon will pretend to be a deity and act like they’re giving a person powers to mess with them, though. Item-based includes things like enchanted or cursed weapons, seals and other things like that. Item-based magic can be made through religion or traditional based practices are safe for just about anyone to use, but items that have gained their enchantments through surviving a particularly terrible event or existing for a very long time should be avoided. It’s possible to wield or carry such an item but the outcome can turn very bad very quickly.  Gaining abilities by becoming transient was much quicker and there weren’t as many limitations. Children of humans and naturally born demons may have innate abilities that are sometimes even stronger than their nonhuman parent’s (they’re considered natural born demons as well). 

If you do join with that character, mine could be a foil for yours. Mine’s going through a one soul, two bodies situation with all the traits he tried to suppress left in the original one after an accident.