This is a story where the world is driven by spirits, and the spirits command the humans. The spirits were as well human, just with their powers. Long a go, the spirit queen, Yue, pleaded her husband to let the humans have powers.
"Please," she pleaded, "Humans walk their days with no defense. The other spirits don't care that they could kill them. Please, let them have some defense."
Her husband, the spirit of diamonds, thought about it. "Fine," he agreed, "but only a little. The simplest move shall take a great amount of effort." Yue agreed with this.
Next, the spirits had to decide what kind of powers the humans should have.
Yue, being the spirit of the moon, offered, "Humans should have powers connected to the moon. I'll power them myself."
Star, the spirit of the stars, liked Yue's idea but added, "And the night too. I'll help you."
"No," countered Jin, spirit of animals, "your ideas are great, but the night doesn't last forever. Humans should be able to be able to have the animals aide them."
The quarreling started on what powers the humans should have, until Song, spirit of music and dreams, spoke. "Humans should have power over the four elements: fire, earth, water and air. Their element would be decided on their location. Not all humans can have this, though. Only the worthy, and if someone in their blood has the power." Some spirits disagreed with Song, but the spirit of diamonds agreed.
So, Shu and Oma, spirits of the land, created four nations: water, earth, fire and air. And so, the bending era began.
The Fire Nation was respected for their spirit and hard working. They had royals, good royals, and were head strong. Even though the people tended to be evil, they got things done.
A child was born one day, and her name was Ursa. Then she had two children. But the one that made history, her name was Azula.