Disclaimer: I don't own A:tLA.
After Sozin's Comet, the war ended, and so began a period of peace between the four nations. Avatar Aang and his Earthbending sifu, Toph, traveled the world to help those who were affected by the war. The newly crowned Fire Lord Zuko worked hard to recover his nation in the eyes of the other nations. The Waterbending Master Katara and her warrior brother Sokka returned home to rebuild the Southern Water Tribe. The world constantly yearned for news or rumors of these young heroes and heroines who had finished the war.
One year after the Hundred Year War, the Southern Water Tribesman Sokka married Kyoshi Warrior Suki, and they returned to the Southern Water Tribe, where their father, Chief Hakoda, slowly retired and passed the ropes of chiefdom onto his son and his new daughter-in-law. A year later, and their first daughter was born, a girl with big blue eyes who they named Kya, after Sokka's dead mother. Two years later, and their second daughter was born, a waterbender, just like her aunt Katara, named Yue, in honor of the Northern Water Tribe Princess who gave her life to save the moon. One year later, and their only son was born, named Koda, after Hakoda. Two years later and they were welcoming another daugher, Takura.
As for Avatar Aang, he married Toph Bei Fong three years after the war. Three years later and airbending twins Aayla and Tenzin were born. Two years after and they welcomed their first earthbender, Gyatso into their family, and one year later, Lin, their earthbending daughter was born.
Unusually, Team Avatar's oldest member, Fire Lord Zuko, along with Master Katara, was the last one in the old group to settle down. They finally tied the knot five years after the war. Later that year, their first child was born, a firebender, Crown Princess Izira. Two years after, firebender Prince Kazuo followed. Three years later, twins Prince Koza, a waterbender, and Prince Kuzon, a firebender, were born. Five years after and they welcomed Princess Xani, a firebender.
Over the course of these years, Zuko was finally reunited with his mother, Princess Ursa, and brought her back to the Fire Nation Palace, where she was also reunited with her daughter, Azula, who did, eventually, with the help of her mother, make a full recovery, and became 'Auntie Azula' to her brother's kids.
Now, nineteen, almost twenty, years after the Hundred Year War, is where our story starts…
15-year-old Crown Princess Izira sat in the shade of the tree next to the turtleduck pond, watching her siblings. Next to her, her 5-year-old baby sister, Xani, was happily feeding the turtleducks. 13-year-old Kazuo and 10-year-old Kuzon were practicing firebending forms, and her younger brother Koza was sprawled out on the grass, sketching absentmindedly with a pencil. She nervously kept an eye out for any accidental bursts of fire, or, Agni forbid, assassination attempts. Her and her siblings, being the children of two separate nations, had met more of their fair share of those who wanted a pure Fire Nation royal on the throne, or Auntie Azula, or Ozai, or just wanted to get rid of the royals period.
So, it was her who first noticed the glowing circle of purple light, not bigger than the pieces of bread that Xani kept throwing to the turtleducks, but steadily growing. Izira stood up, automatically straightening her formal robes and topknot.
"Kaz, Kuz, Koza, Xani," she called out. Kazuo and Kuzon put on their formal robes, Xani stopped feeding the turtleducks, and Koza closed his sketchbook and fixed his blue eyes on hers. "What's that glowing circle of purple?" She asked, pointing. Five sets of eyes focused on the growing purple circle.
"Is it getting bigger?" Xani asked inquisitively.
"Looks like it," Koza replied nervously.
"I wonder what will happen if…" the little dark-haired girl reached out to touch the circle.
"No, Xani!" Izira cried out along with her three brothers, reaching out to grab her younger sister's arm. Too late. Her finger touched the circle, and all five of them felt their feet leave the ground.
"Uh oh," Xani said in a small voice.
Izira saw Kazuo open his mouth, as if to say something, but she firmly elbowed him in the stomach.
"It's alright." she said. "At least we're all together." They traveled through a whirling mass of purple, violet and lavender.
"Well, look at it this way," Kuzon said cheerfully, "At least we'll probably miss dinner with all those stuck-up dignitaries tonight!"
The whirling portal disappeared. Izira caught sight of upside-down structures, mist, a dark night sky and what appeared to be a cliff wall before she and her siblings fell. A blast of orange fire whipped at them. Instinctively, she called on her own fire, purple flames streaming from her hand to block them.
"Ouch!" Kazuo yelped. "Get off me, Koza!" They hit the ground, tangled in a mass of limbs. With much difficulty, they disentangled from each other. Surrounding them were eleven people, seven of them looked like teenagers, one in a wheelchair, two adults and one boy. There was a teenager who had an arrow on his head, just like Uncle Aang, a teenager who was holding a boomerang and had a warrior's wolftail, a girl who was blind, like Auntie Toph, another who looked a lot like Auntie Suki. Out of the adults, the man she couldn't recognize at all was clearly Fire Nation, and heavily built and had facial hair. The last one sported a Water Tribe hairstyle, and looked suspiciously like Grandpa Hakoda. But the most remarkable two people were two teenagers. One had a scar covering one side of his face, gold eyes, duo dao swords strapped on his back, and looked like a younger version of their father. The other had startling blue eyes, a stream of water hovering above her outstretched hand, Water Tribe clothing and looked like their mother.
"What are you doing here?" the one holding a boomerang asked. "Are you spies for the Fire Nation?"
"What?" Kazuo asked, confused. "Why would the Fire Nation need spies?" Izira noted that somehow, mysteriously, they had all changed out of their formal robes and were missing their topknots and hairpieces.
"Don't you know?" He replied. "There's a war going on, between the Fire Nation and Fire Lord Ozai against the rest of the world! And you lot look Fire Nation, so you're probably on his side."
"What?" The siblings all chimed in, making sounds of disbelief. "But the War's been over for years!"
"Please don't tell me you got stuck in an iceberg for a hundred years too." He mumbled.
"Stuck in an iceberg?" Kuzon said, puzzled. "We haven't, unless you count Koza's waterbending accidents. And those were years ago." He pointed to his twin.
"I have not frozen you into an iceberg!" Koza snapped, irritated. "I want to, but I haven't, yet."
"Wait. You're a waterbender?" The Mom-Katara lookalike said, blue eyes flashing curiously.
"How did a waterbender end up in the Fire Nation?" The boy with the boomerang—who was really starting to sound like Uncle Sokka—said.
"Er…Mom's a waterbender, Dad's a firebender." Izira said awkwardly.
"Look," was the irritated snap from Dad-Zuko lookalike. "Are you here to kill us, maim us, hurt us, capture us, spy on us or are you here to join us?"
"Uh, what?" Kazuo said. "Here to join, I guess…" He looked at his older sister, asking for permission.
"Sure…if that's alright with you…" Izira mumbled.
"Wait! We still don't know if they're Fire Nation spies!" The guy with the boomerang said.
"Sokka, calm down. I'm sure they aren't if one's a waterbender." Mom said.
"But the older one's a firebender!" Sokka protested.
"What's wrong with being a firebender?" Kazuo said, offended.
"Nothing," Dad said. "He's just paranoid."
"Okay then, how many of you are actually benders?" Sokka said, sighing.
"All of us, Koza's the only waterbender, the rest of us are firebenders." Izira said.
"Are they telling the truth, Toph?" He asked the blind girl, who must be Auntie Toph.
"Yes, Snoozles." She replied, sounding bored.
"Well then, sit down, and tell us a bit about yourselves." Sokka said, sounding disappointed, like he'd have liked to attack them. They did, sitting between Dad and Auntie Toph.
"I'm Izira, the oldest." She started. "Er…you already know I'm a firebender," she summoned a purple flame to her hand.
"I'm Kazuo, the second oldest." He continued. "Also a firebender." The blueberry coloured flame appeared in his hand.
"I'm Koza." He followed. "Only waterbender." He lifted a glob of water.
"I'm Kuzon. Me and Koza are twins." He said. "Firebender, and I make the best tea after our Dad's uncle." He let the royal blue flame dance in his hand.
"I'm Xani. I'm the youngest." The little girl said shyly. "I'm a firebender too." She generated her ice blue white-tipped flame. "And this," she said brightly, holding up her stuffed turtleduck, "is Quackers!"
"Er…Okay." Sokka said, unsure how to react. "I'm Sokka."
"I'm Katara." Mom said.
"Toph." Auntie Toph said.
"Zuko." Dad muttered.
"The Duke." The little boy said.
"I'm Suki." Auntie Suki said.
"Chit-Sang." Izira recognized his name from the bedtime stories Mom and Dad liked to tell.
"Haru." A guy who had a ridiculous mustache said.
"Chief Hakoda, of the Southern Water Tribe." So this was Grandpa Hakoda. But everyone looked so much younger…
"I'm Aang, the Avatar!" Uncle Aang?!
"Prove it!" Kazuo blurted out. "'Cause we've got an honorary uncle that's also named Aang, and he's the Avatar!"
"So there are other airbenders out there?" was Aang's hopeful question.
This was interrupted when Xani yawned, rubbing her eyes like she was about to fall asleep.
"Can we postpone this argument?" Izira asked nervously, eyes flickering towards her sleepy younger sister. "Do you have anywhere to sleep?"
Her mother followed her gaze. "Sure," she said. "The two of you can sleep in my room. Turn left and it's the second one on the right."
"The boys can sleep in mine. The first one on the right." Their father muttered.
"Thanks." Izira said.
"Is this your stuff?" Uncle Sokka asked, holding up a bag. Izira thought she saw a flash of gold and red.
"Probably." Izira said, holding out one hand. He tossed it over, where she briefly rummaged through to find their sleeping bags.
"Here. You'd better go to bed too." She threw one at each of her brothers, and slung two over her shoulder. "Aw…Come on, Xani, don't fall asleep…" Her little sister wobbled on her two feet, rubbing her tired eyes.
"Mrmph." The little girl protested, and fell right back down. Izira sighed.
"Here." A low voice said. She whipped around to see that Zuko had picked Xani up.
"Thank you," she said gratefully, and they made their way into the temple.
After getting Xani settled in bed, Izira and Dad made their way back to the group.
"Kuzon, Koza. Bed. Now." She snapped, irritated, seeing her twin brothers.
"Aw...Izzy..."The twins protested.
"Don't 'aw, Izzy' me." She glared at them. "Bed. Now."
Grumbling, the twins made their way into the temple.
"How did you do the purple and blue fires?" Uncle Sokka asked inquisitively. "We've only ever seen blue ones—"
"—Azula's—" Dad's mutter.
"—and we've never seen purple ones before." He finished. Izira and Kazuo glanced at each other. They themselves didn't really know why their flames were different colours.
"Er...we...don't know?" Kazuo mumbled.
"My flames have always been purple." Izira admitted, shrugging. "Been that way since I started firebending, and the same goes for Kaz and the others."
Mom glanced at the silver moon in the sky. "Everyone should get some sleep now, especially you, Aang." She said calmly. "You do have firebending practice first thing in the morning, after all."
"Can't I skip for one day, Sifu Hotman?" Aang pleaded.
"No." was Dad's only reply, and he headed to his room. Kazuo followed.
Everyone else dispersed, and her mom stayed behind to nag everyone into going to sleep. Finally, she too headed off to sleep, and Izira followed her. They made their way into the bedroom, where Xani was sound asleep.
"So, which tribe does your mother come from?" Katara asked.
"The Southern Water Tribe," Izira said awkwardly, wondering how she would act if she told her that Katara was actually their mother.
"Really?" she said. "That's wonderful! Right now though, before Sokka and I left, I was the only waterbender in the Southern Water Tribe. Was your mom captured by the Fire Nation?"
"Er...It's more like she got separated, and couldn't find any way of transport back...and then she met Dad, and well...er...they fell in love and got married and well...here we are." Izira said.
"Okay. Good night." She said.
"Good night." Izira whispered back. So they had gone back in time. She had to find a way to tell Xani and the others next morning, and not to tell the GAang anything. But first, she told herself, sleep.
Constructive criticism welcomed...
Is it clear enough?
Are the people in character?