Appa

The very first moment in Appa's life that is shown in the series is when he meets Aang for the very first time. When the Airbender reaches the age of six, he is sent to the Eastern Air Temple. It is there that his sister Io introduces him to a bison, which goes on to become his lifelong buddy and companion. There is a lack of information on the origin and development of the relationship that exists between the Air Nomads and the flying bison. It seems that Appa's mother did not feel obligated to force her small cubs into the care of the young monks. Aang moves closer to Appa and extends the fruit to him as a gift. They bond as pals almost instantly, and from this point on, they will be inseparable companions.

Both Appa and Aang went into a state of hibernation within the iceberg and remained there for a hundred years until being awoken by Katara and Sokka. Since that time, Aang and his companions have relied heavily on him as their main mode of transportation on their expedition to achieve mastery over the four elements. Appa was an essential member of the group for the whole of the show until the sand magicians abducted him and took him away.

Appa was taken hostage by the sand magicians in the Earth Kingdom, which is located in the center of the Shi Wong Desert. Aang, Katara, Sokka, and Momo were all in the subterranean library at the time. After that, he was bought by the Fire Nation Circus, where the trainer attempted to coerce him into doing a performance. Appa managed to get away and ended up wandering across the Earth world until he ran into the warriors of Kyoshi. They did their best to treat his wounds and bring him back to Aang. On the other hand, Appa had little choice but to run away as Azula and her companions launched their assault on Kyoshi's troops. Suyuki was successful in driving the bison away, and the warriors did all within their power to capture Azula. Soon afterwards, Appa found himself at the Eastern Temple of the Air, where he was able to meet Guru Patika. The bison was able to put his confidence in the guru, and the guru was able to cure his mental scars. By using the spiritual link that existed between Aang and the bison, he was able to tell him where Aang was. After leaving, Appa went to Ba Sing Se, where Long Feng was waiting for him.