Yue was a princess of the Northern Water Tribe, daughter of Chief Arnook, as well as one of the latter's advisors. After the death of Tui during the Siege of the North, she sacrificed her life to replace it and shared its position as the Moon Spirit.
Due to the conflicts of war, 4 groups of warriors with elements (fire, water, earth and air), at wat war to take the dominance in order for their tribe to thrive in the struggling times.
