Dock/Xu/Bushi

"fire"

- My name's Dock. Mind if I ask who you are?" "I'm not Dock, I'm Xu. Dock's my brother." "All right, I'm Bushi! Let's get some river cleaning done.

Dock/Xu/Bushi was a villager who seemed to be suffering from dissociative identity disorder, splitting his personality between three different people. He lived in the small fishing village of Jang Hui, situated right next to a Fire Nation factory which was polluting the water of the river on which the village was situated. His ill mental state was present due to drinking the contaminated water.

History
Mainly one person, Dock, ferried people across the water and operated the docks, which he said is where he got his name from. His second personality, Xu, whom he claimed to be his twin brother, operated the village fish market. He also introduced a third personality, whom he said was his brother Bushi. Each of his personalities were distinguished by the hat that they wore. When Aang and his friends were preparing to clean the lake, they asked if Dock would like to help. He said no thanks but that he would get his other brother Bushi, who he said loved cleaning rivers. He changed his hat right in front of Aang and his friends; however, when Aang told him that the former had finally caught the latter, the villager became confused and said that he had no idea about what the Avatar was speaking. Finally he seemed to catch on and said that his brother Dock was crazy and pretended to be other people, only infuriating Aang more.

According to Dock, Xu was a real blabbermouth, while his third personality, Bushi, claimed that his brother Dock was crazy.

Trivia

 * Later in the series, Aang wore the same hat Xu wore as the shopkeeper.
 * In the end credits, the name for Dock/Xu/Bushi was just Dock. This proves that his real name was probably Dock.
 * The closed captioning used Shoe instead of Xu due to the show's creators assuming that Westerners might mispronounce Xu.
 * The name Bushi may be derived from the Chinese word bushi (不適) which means "unwell". This is a fitting reference to him being mentally unwell, and might be used to show the irony when he calls his brother physically unstable.