http://www.whats-your-sign.com/fire-symbols-and-meanings.html

this is where I pulled Aria's from. The other two I read in a book back in highschool. I did a research project on the "Unknown Sicence of the Old World" and it kind of stuck in some areas. You can see at the bottom of the list of things that Fire Represents it says "The Untamed" I thought that suited her spirit and her element.