Heya! We have some info pages in the FAQ, Culture, the City, and the like that might help. You are welcome to say that Cynthia is part of an important family, yes, and that she lives in a nicer area. This stuff we don't have much restriction on besides that you can't write her as the heir to the non-existent Union throne or something and common sense things like that.

Enlightened Abilities are here and you are not required to give an explanation of the types and Ability you choose, though you can if you'd like. God of War and Dark/Dragon is fine.