She fears that Aang will not be able to master all four elements before Sozin’s comet arrives.
Aang refused her help, seeing as how the machines were disrupting villages.
Only the Avatar, master of all four elements, could stop them. A hundred years passed and my brother and I discovered the new Avatar, an airbender named Aang.
But then, everything changed when the Fire Nation attacked.
The Avatar: The Last Airbender video game allows the player to control one of four characters – Aang, Katara, Haru, or Sokka – in a single-player adventure.