{Based on Season 1 of Avatar the Last Airbender}
Drin and Silver are twins from the Earth Kingdom, Omashu, which was where they grew up, and their mother is a Earthbender of great caliber. But their father was a Waterbender from the Southern Water Tribe. Now, after 12 years of living among the Earth Kingdom, they have decided to go together to the Southern Water Tribe. Drin is a near master at Earthbending, taking after his mother rather then father.
Silver is the shock, holding much more power then her brother in Waterbending as well as her Earthbending, that her mother taught them both. Now at 15 years of age, after once visiting the Northern Water Tribe, now they once again turn to their goal. To see their father's home, and where he learned a way being a great Waterbender, and a good father. When they arrive at the Water Tribe, they are greeted with suspicions, until Silver shows what she can do. Then, she is treated as hero, and is put to work. Manning the defenses, and on the rare occasion for it, going out to fish with Sokka and Katara.
Katara is the only Waterbender in the Southern Water Tribe since long times ago, and now the twins have arrived, and she is hoping Silver will teach her.
Then, one day when they're all out fishing together, they find a boy, who had been frozen in ice with his flying bison for Avatar only knows how long.
He is clearly an Airbender, and he is clearly a young boy, but he might just be more then he appears.
Drin believes that his people tossed him into the water to save him from the Fire Nation's Thirst for blood.
Sokka believes he's just an Airbender, who got lucky enough to survive the clear and brutal massacres of the other Airbenders.
Silver and Katara both believe, that Aang the boy the Airbender who was frozen in ice could in fact be the Avatar.
That the world has been waiting for 100 years for him to return, bring balance and peace back into their world.
Meka is a water bender but she doesn't live with water benders. She was found alone when she was five by a group of gypsies. They were a group who gather together because the fire benders destroyed their homes. Hana took care of Meka as if she was her little sister. Meka learned on her own on how to bend water as perfectly as she could. Hana soon fell in love with a fire bender but wouldn't dare tell the others since they hate firebenders. As they started to travel again Hana was found pregnant and told the group it was an earth bender that she fell in love. Hana dies gave birth to a boy named Mikoto. Meka just turned ten but raised him as her own as how Hana wanted for him to be raised but when Mikoto turned 6 he accidentally burned another kid when he was getting bullied. When they banned Mikoto, Meka clearly went with him not caring if he was a firebender. Mikoto was Meka's baby boy.
Zuko and Iroh found a boy run to their camp with tears in his eyes begging for them to save his mother. As Zuko went to help what he expected was an older women, found a girl about his age with beautiful long silver hair. After saving her Meka begged that they teach Mikoto how to firebend. After accepting they started to travel together. When Zuko starts to fall in love with her what would he do when he finds out she's a water bender. Follow their journey as they travel around and try to save the world.