Katara Watertribe is one of the central characters in 'Avatar: The Last Airbender.' She hails from the Southern Water Tribe and is a highly skilled waterbender. As the only waterbender in her tribe at the start of the series, Katara is both resourceful and compassionate, acting as a motherly figure to her brother Sokka and guiding Aang, the Avatar, on his quest. Her strong sense of justice and determination make her a key member of Team Avatar.