Raava

Rava, is the spirit of peace, balance and light in the world. In 19830 BSCRava began to combat her natural opposite, Vatu, the spirit of darkness and chaos.

History
Around the time when Wan began living with the spirits and learning firebending Rava and Vatu were fighting in the Spirit Wilds, near Wan's camp. As the two spirits brawled they caused destruction of the forest around them, causing other spirits to flee. Wan, came to the two and tried to persuade them to stop, Vatu tricked Wan into freeing him from Rava's grasp. After Vatu escaped Rava became very angry with Wan.

Legend of Korra

 * Beginnings, Part 1