The Swampbenders includes Hue, Due, and Tho. Tho and Due was hunting Appa and Momo after they were seperated from the Gaang. Katara, Sokka, and Aang was lost in the forest but then regrouped after being delusional. They were being chased by Hugh(Swampbender)that was disguised in plants and roots to become a swamp monster. They soon talk to Hue about Aang and his journey to learn all of the martial arts and to defeat Fire Lord Ozai. On book 3 they are brought to help with the invasion and especially to help Sokas new invention which was the submarines to work.