Who did avatar Suka finally marry?

Avatar is an animated TV series Avatar, which is popular in Nickelodeon, USA. This paper mainly tells an adventure story made up by an oriental myth: the world is dominated by four kinds of divine powers (air, fire, water and earth), among which only the "magical power" owns these four kinds of divine powers at the same time, so he has the ability to save the world. After a hundred years of silence, katara and Sokka found it by accident. Later it was adapted into movies and games.