Shu


 * You may be looking for the Fire Nation general.

First mentioned in "The Cave of Two Lovers", Shu and Oma were the world's first Earthbenders. Their tombs lie side by side within the walls of the cave, whose decorated walls tell their story.

History
Shu met Oma on top of a mountain that divided their two villages, but because they belonged to two enemy tribes, they were forbidden from seeing 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 dwelt 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 Shu was killed in an attack on his village. Distraught by her loss, Oma unleashed 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.

Trivia

 * Shu's name, 舒 (shū), is a Chinese surname meaning "relax".