User blog comment:Godzillavkk/Kingdom of the North vs Northern Water Tribe/@comment-11361577-20190522211744

Other than the fact that giving the Northern Water Tui and La is really unfair, Katara, Sokka, Hakoda, and the Swamp Tribe aren't part of Northern Tribe. The first three are part of the Southern Tribe while the Foggy Swamp Tribe is independent of the North.