<P> Katara (Chinese: 卡 塔 拉; pinyin: Kǎ Tǎlā) (voiced by Mae Whitman in the original series, voiced by Eva Marie Saint in the sequel series, and portrayed by Nicola Peltz in the live - action film) is Aang's best friend, later becoming his girlfriend and ultimately, his wife . </P> <P> In the original series, she had mastered the art of waterbending at the end of Book One, and therefore began teaching Aang the art alongside his study of earthbending in Book Two . Katara is known for resisting gender stereotypes; but acts as den mother to the other protagonists . As a waterbender, she is able to heal injuries, change water into ice, and use it to cut through solid objects . She is known to become enamoured easily, and is often angered by treachery or dishonesty . She also learns bloodbending, the manipulation of liquids within a living creature, in Book Three . </P> <P> In the sequel series, Katara is revealed to have married Aang and had three children . In an earlier version of the pilot episode, Katara's name was Kya: a name later re-used as her mother's name and later that of her daughter . In the sequel series, Katara is Korra's Waterbending master . </P> <P> Sokka (Chinese: 索 卡; pinyin: Suǒ Kǎ) (voiced by Jack DeSena in the original series, voiced by Chris Hardwick in the sequel series, and portrayed by Jackson Rathbone in the live - action film) is a 15 - year - old warrior of the Southern Water Tribe, and Katara's elder brother . With no bending power of his own, Sokka relies largely on a metallic boomerang, a blunt metal club, a machete, and later a black jian created from the metals of a meteorite . Surprisingly in an inhabitant of a mystical world, Sokka is an engineer and something of a jack - of - all - trades, in which respect he is easily able to understand the Fire Nation's advanced technology, and perfects the design of the hot air balloon . In addition, he is both heterodox and resourceful in his endeavors, and a source of comic relief throughout the series . Sokka was in love with the Northern Water Tribe princess Yue at the end of Book One and later shifted his affections to the Kyoshi Warriors' leader Suki in Books Two and Three . </P>

What happened to the characters in avatar the last airbender