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Consequence
It was easy to change destiny.
Chun Hei Wu's very existence was proof of that. Her grandfather, Fong, had been an Airbender and he had chosen to leave his nation for the love of a lifetime. Her grandmother, Jen, was from the Earth Kingdom. No one in her clan had bent anything in generations, and there had been meat at the wedding. Cutting ties with the other nomads began as star-crossed love and became survival.
Sozin's Comet came, the War came, and finally Wu came. Born in the autumn, Fong had been terrified that she would sneeze in front of a Fire Nation patrol and be executed. As the years passed, it became clear that she had no talent for bending the elements. Instead, she had an itinerant youth and a talent for something as difficult to grasp as air. Wu could walk down a street and know who would lose their favorite hat, who would have children, who would die in battle. It was wonderful and horrible.
Even when she was surprised, Wu could see the outcomes. If she left that area, she would survive this plague; if she married her suitor, they would both wind up having an affair. Fragile strands of consequence stretched away from everything.
When Wu began to wear the yellows and orange of her grandfather's people after his death, she knew no one else understood it. The Earth Kingdom was already forgetting the Nomads. And as she came to a village ensconced ridiculously close to a volcano she could feel Change coming to life.