Avatar Kyoshi lived for 230 years making her the oldest avatar to exist! Shown in the episode "avatar day" Kyoshi had a small war with general chin the great and lava bent a border between her village and his, later on she bends a huge air blast separating her village and making it an island to keep her people safe from invaders. in her Honor they call the island Kyoshi island. the warriors who protect this island are called the Kyoshi warriors and Suki was one of them.
Toph Beifong was the most skillful earth-bender in avatar the last airbender, she was blind and could see using her feet by feeling the vibration in the earth below her. Toph was the first metal-bender ever to exist, because she created it! Fun Fact: in the future Toph turns her space rock into a bracelet to figure out which earth-benders had the potential to metal bend or not, she later creates a school called Tophs Metalbending Academy, There is a comic coming out in February 2021 about it
"I am a warrior, but I'm a girl too."
— Suki
Suki was the leader of one Kyoshi Warrior team of the Earth Kingdom's Kyoshi Island. Having begun her training when she was only eight years old, she was well-respected by her fellow warriors for her leadership and combat skills. When Team Avatar arrived on Kyoshi Island, Suki and a few other Kyoshi Warriors captured them, thinking they were Fire Nation spies, but released them and befriended them after realizing Aang was the Avatar. Inspired by the outsiders for helping save their village from Prince Zuko, she and the other Kyoshi Warriors left the island to help the Earth Kingdom fight against the Fire Nation. During their journey, she protected the Avatar's lost sky bison, Appa, from falling into the enemy's hands, but she and the other Kyoshi Warriors were defeated by Princess Azula, Mai, and Ty Lee.
"I hope you will think like a mad genius!"
— Bumi to Aang.
Bumi was the wild-eyed, eccentric, elderly King of Omashu. Prior to the start of the Hundred Year War, Bumi had been a close friend of Avatar Aang, and he remained the only known friend from Aang's childhood still alive by 100 AG. He became an old and wild man, prone to cackling and snorting laughter at jokes. Despite his apparent frailty, Bumi was an earthbending master, at one point claiming himself to be "the most powerful earthbender you'll ever see".
The cabbage merchant was an Earth Kingdom businessman and founder of Cabbage Corp. Originally an ordinary salesman who specialized in selling cabbages, he was constantly plagued by misfortune during his business endeavors, as his cabbages were continually destroyed or damaged after encountering Team Avatar and their enemies. The cabbage merchant traveled to various locations in the Earth Kingdom in his profession, selling cabbages from a cart that was repeatedly destroyed, to which he would exclaim, "My cabbages!" As he traveled widely, the merchant was able to collect various recipes related to cabbages.