Tienhai

Lady Tienhai was a giant humanoid spirit who tended to the seashore of what would later become Earth Kingdom territory, under the watchful eye of her friend and protector, General Old Iron. She became the guardian of the city that was erected on the shore where she lived, which resulted in a rift between her and Old Iron, and her eventual death centuries later.

History
During the era of Raava, Tienhai tended to the seashore as if it were her garden. When a tribe of humans appeared, she became fascinated with them and took on the role as their protector, entertaining their requests. When General Old Iron, fearing for her safety, tried to destroy the tribe, Tienhai stopped him, forsaking her friendship with him as a result. Over the course of centuries, the people prospered under Tienhai's guardianship, their city growing into the most powerful of its time. However, during Avatar Yangchen's time, Tienhai met her end due to the actions of the king of the city.

Trivia

 * Tienhai is similar to the East Asian deity Guanyin, who is the Bodhisattva of compassion.