Disclaimer: I do not own Avatar: the Last Airbender.
NOTE: Everything is the same until Sokka and Katara meet Appa. Also my grammar and punctuation may suck.
NOTE 2: I have been re-reading my chapters and fixing any mistakes I see.
Chapter 1: The Twins in Iceberg
"This is Appa my flying bison" said Aang
"Right and this is Katara my flying sister" said Sokka
Just after Sokka said that Appa sneezed on Sokka and another groan was heard from on top of Appa. "What is all that noise about we are trying to sleep up here" said a female voice as three heads popped over the saddle one human one fox and one feline.
"Kitty" yelled Aang as he jumped up onto the saddle and hugged the girl. "Sokka, Katara this is Kitty, Haki and Kali" he said as pointing to the girl, fox and cat respectively. The girl was about the same height as Aang with black-purple hair, the most unusual purple eyes and what looked like tiger stripe tattoos on her wrists, ankle and neck. The fox, Haki, was midnight black with red tipped ears and tail, forest green eyes and went up to waist height. The Cat was only the size of a small kitten (think Kirara's small form from Inuyasha) had sapphire like eyes, two tails and had an icy blue coat with black ivy like markings on its tails, legs and paws. "Kitty is my twin sister she is older by a few minutes. Kali and Haki are her companions a demon cat and demon fox respectively."
(Village){Kitty's POV}
[Aang is off penguin sledding with Katara]
"So there has been a war going on for 100 years?" I ask.
"Yes the fire nation attacked the air nomads first then started attacking the earth and water nations. A couple of years ago my father and the other men of this village went to help fight the war," Sokka said then suddenly there was a loud noise when everyone turned to look they saw a flare from the area where the old fire nation ship was. Aang and Katara walked up to the village a few minutes later
There were cries of "Aang is back" from the children
Sokka said "warriors away from the traitor the foreigner is banished from our village."
"Fine if he is banished then I am banished too" Yelled Katara at her brother.
"Will you really choose him over you village and family?"
"I don't want to get between you and your family Katara" said Aang quietly
"Wait for me if you leave we are going too" said Kitty as she walked up and jumped on Appa in one leap. Haki and Kali came running up Appa's tail.
"Bye Katara" said Aang as he jumped up onto Appa's head and flicked the rains
We headed out of the village and ended up a ½ mile away in an oddly shaped ice statue. We were taking a break when we heard a ship approaching.
"The village" Aang yells. I follow Aang to the penguins and follow at a little bit of a distance down towards the village. I see Aang trip one of the firebenders, probably the leader, by sliding through his legs.
"Looking for me?" said Aang as he stood up from where he had stopped after tripping Zuko with his staff and a penguin.
"You are the airbender. You are the avatar?" the scarred prince said in disbelief "You are just a kid" the heat from his rage melted the snow off of his armor. Aang smirked as just a second later Kitty slides under the prince the same way Aang had just a few minutes before in her hands was a sheathed naginata.
"Thanks for coming Aang, Kitty" said Sokka unenthusiastically.
"Welcome Sokka it was a pleasure" I chirp happily as I arch my back like a cat popping it a couple times. "Mmmmh no wonder Aang likes penguin sledding so much its relaxing and exhilarating at the same time."
"I wonder how he fell for the same thing twice" said Aang as he looks at Zuko curiously.
This seemed to piss off Zuko as he suddenly threw several fist sized fireballs. Both Kitty and Aang spun their respective bending tools to ward off the fireballs but a little fire managed to get past him to blind Kitty and nearly hit several villagers but water and snow suddenly made a thin barrier between the fire and villagers. Aang thrust out his staff and offered himself from the villagers' safety. Zuko gave a small nod and the fire warriors grabbed his staff and pushed him onto the ship. The ship set sail and in a few minutes was out of sight.
KITTY POV
I hiss as I cover my hands in water a few seconds later I had healed most of the wounds you could still see a flame like pattern around my eyes luckily it would not scar but I knew that she would not be able to see for a while.
"Kitty, are you okay" asked Katara and Sokka in synch
"Yeah, I just will not be able to see normally for a while. I will have to see with my bending but that is okay I have done it before. Aang's old friend Kuzon accidently blinded me before and I learned to cope and see with my bending and other senses" I explain as I stand up and dust off my shirt.
I tighten Appas reins and gets ready to leave when I heard "Wait for us, Kitty." I turn and looks and its Sokka and Katara with a couple of packs. Gran-gran walks over and gives them a pack of food and wishes them good luck. I say "Yip-Yip Appa" and they were off to rescue Aang.
I jump from Appa as Aang fell over the edge and water rushed up to catch me. Suddenly a pillar of water with Aang riding it surfaced, his tattoos glowing. Together they bashed the fire soldiers against the edge of the ship. Aang's tattoos faded to the normal blue and he swayed Kitty caught him before he could fall. Appa landed and Sokka went to fetch Aang's staff while I handed Aang to Katara then I held up the remaining fire soldiers. Sokka and Katara ran up Appa's tail to the saddle. I jumped up onto Appa's head and said "Yip-Yip" they were off. Appa was almost out of reach of the firebenders but Zuko had managed to recover and he and his Uncle Iroh threw a flame at the bison.
Kitty knew that Aang was not recovered enough to airbend the fireball away so she grabbed his staff and deflected the fireball into the icy wall of the glacier.
"Why did you not tell us you were the avatar" asked Katara
"We never wanted to be" Kitty and Aang said in unison.
"The monks explained to us that we were both the avatar because we were the only airbender children conceived as he was dying. Since there was no other choice of the next avatar we were chosen but since Roku could not distinguish between the two of us in the womb we both became avatars. Aang became the Airbender and I became the next waterbender avatar, because you cannot have two avatars of the same element at the same time. Luckily enough the monks realized this early and had a waterbender come to teach me but he could only stay for a month. Because there were two avatars they had a problem they could not teach Aang waterbending first they asked the spirits what to do and were told to teach us both airbending at the same time and if the opportunity presented itself I was to learn waterbending from travelers." Explained Kitty as she rested against Haki's side with her eyes closed she sounded older and smarter than they thought she was almost as if she had suffered from something horrible.