alright i took your ideas into account.
Earth God: Power Hungry like a bitch.
Fire God: Feels obligated to better the world, but is a bit aggressive.
Thunder God: Stumbled upon The Circle and joined.
Water Goddess: Used it to attempt and save someone, yet failed.
Air Goddess: Member of the Royal Family, however, that family is long dead.
Note: In the story they have been alive for hundreds of years, they are semi-mortals. They can live forever, but still feel pains.
That sound about right? It can be changed.