Hi, I was just reading 1st chapter of your fanon, and I have changed 'Uggi' to 'Oogi', since it was the actual name of Tenzin's bison. It it was someone else, and not the same bison, you can change it back. :)
Oh, and one more thing. I think it would be better if you change the town in which Korra and others stop during journey to Ba Sing Se. Actually, Kyoshi Island is located in the southern Earth kingdom, while Ba Sing Se is in the north. If someone goes from United Republic to Ba Sing Se, Kyoshi Island cannot be in their way. You can also check it on the map on the main page.