Shu

History
First mentioned in "The Cave of Two Lovers", Shu and Oma were the world's very first Earthbenders. Their tombs lie side by side within the walls of the cave, whose decorated walls tell their story. Shu met Oma on top of a mountain that divided their two villages, but belonged to different tribes who were currently warring with each other. However their love was strong and they were able to find a way. The two were able to learn earthbending from the badgermoles that dwelled within the mountain, and using their bending, were able to carve out elaborate tunnels where they continued to meet secretly.

The two lovers continued their meetings until one fateful day in which Shu didn't come. As it turned out, he had died in the war. Distraught by her loss, Oma unleased a potent display of her earthbending prowess, but rather than destroying the two villages, she declared the war between them over. Together, both villages helped her build a new city where they would peacefully coexist. The great city came to be named Omashu as a monument to the two lovers.