The Preservers were a unique faction within the White Lotus. The group had been built, by Sokka's express demands, all training overseen by him, so that they could see to the protection of a unique location in their world.

The hardest part of such an endeavor, of course, was taking his leave from his family occasionally in order to see this enterprise succeed. If asked, of course, Sokka would always claim that the average period of time he could endure without them was five minutes, but where the world's progress and stability were concerned, both he and Azula were ready to make whatever sacrifices were necessary.

Now, the world reaped the benefits of such sacrifices… of the success of a venture many would have considered too dangerous, too worrisome to be carried out at all. Humanity could not be trusted with this kind of responsibility…

Truthfully, Sokka agreed with that notion: thus, Sokka ensured to set all kinds of boundaries and limitations around any visitors who sought to enter Wan Shi Tong's Library.

"It's amazing that this is even possible…" Aang laughed, standing in the grand, golden halls of the library, eyes glancing over the Preservers, standing guard by the Library's entrance and its main halls. Katara smiled, looping an arm around his. "But humans and spirits are actually working together."

"I might just be crazy, but… it almost sounds like there's greater balance between our nations, and worlds, than there ever was," Katara said. Aang smiled and nodded.

"It's not effortless… but the hard work is worth it. We can teach people better… show them the right path," he said, with a proud smile.

Wan Shi Tong had been persuaded to trust humanity one more time: the grand building rose out of the desert anew. The grand doors had spread open once again. Even now, however, there were limitations to the spirit's leniency: he still probed and tested newcomers, and whoever failed to earn his approval, whoever answered his questions poorly, would have to settle for waiting for another visitor to make a copy of whatever books they wanted to check or borrow.

It could be a complicated system, but one that worked fairly well: Sokka had come up with many of its solutions, including the rather obvious one of crafting safekeeping copies for every tome, for Wan Shi Tong's reassurance. The owl spirit seemed pleased with his support and cooperation… enough to allow what Sokka had never imagined he would, once he asked it of him:

A large family, either astride or walking beside dragons, crossed the Library's golden gates on the morning when the Preservers began serving in the Library.

"Wow… wow!" Shun gasped.

"This is… it's a miracle!" Rei gasped, tears in her eyes as she covered her mouth with her hands.

"Where's the owl?" Yuuna pouted.

"So many books…!" Hotaru gasped. "N-no one would be able to read them all!"

"Fortunately, Wan Shi Tong's helpers will be around to ensure you find the ones you're interested in," Azula smiled, clapping her daughter's shoulder. "Now, then… keep your dragons in check. I'm afraid that when he turns up, they'll…"

On cue, all the dragons tensed up: a dark presence, lower down the hallway, caused Yuuna's nervous dragon to squeal, jolting back with the child riding on his back.

"Hey, hey…!" Sokka clasped the dragon's reins, ensuring he wouldn't topple backwards. "No need to worry. He's not going to dissect any of us: he promised."

"It's illegal," Yuuna said, firmly. "No one can dissect a dragon."

"Yeah, I'm sure Wan Shi Tong would feel bound by that law… right?" Sokka said, turning around with an awkward smile: the owl approached gloomily, eyeing their family with an unreadable expression. Xin Long, while also tense, appeared to reassure Hotaru and Shun's dragons, though they still shivered while hiding behind him.

"I see you have arrived. The Avatar and the Preservers said you would be here today, Sokka… and you brought your family, indeed."

"Hey there," Sokka smiled, waving at Wan Shi Tong. "Guess introductions are in…!"

"No need. I know who they are," Wan Shi Tong stated. "Rei, the eldest, a scholar. You are welcome to browse my collection."

"I… I am?" Rei gasped: Azula smiled as her daughter shivered with excitement. "Y-you'd let me…?"

"Provided you do not stay until after the doors close. Our service hours are much stricter nowadays," Wan Shi Tong declared.

Rei couldn't contain her excitement, hugging Azula eagerly at the thought of examining countless books she'd had no access to before. Wan Shi Tong turned to the next child, though:

"Hotaru. You may find our collection on firebending and swordsmanship to your liking… though I suspect you would prefer to read fantasy books, today."

"I…! W-well… maybe a few. I can… I can study and have fun, right?" she said, looking at her mother expectantly. Azula smiled and nodded.

"You're free to do as you wish, provided you follow the rules," Azula assured her.

"Shun. You may browse the firebending section with your sister," Wan Shi Tong continued: the boy blushed upon being addressed, shrinking in place. "It has expanded thanks to your parents' contributions. Ensure to thank them for it."

"I-I will. I… thank you," Shun said, bowing his head towards the owl.

"Yuuna… zoology section: third floor, fifth wing."

"Good."

The child didn't bother waiting to check with her parents: she spurred her dragon to take flight, and the whole family gasped as they took off through the floors of the Library, right towards her favorite subjects.

"Sorry about…! Oh, hell," Sokka groaned.

"I'll keep an eye on her," Rei laughed, clapping Sokka's shoulder before setting out to the third floor, too.

The children scattered, with Hotaru and Shun lingering not too far from the entrance, meeting up with Aang and Katara, while Rei chased down the restless Yuuna. Wan Shi Tong watched the two kids, though it seemed his attention lingered on their dragons.

"You fulfilled your many vows to me, in your last visit," he said, turning his head towards Azula. "I feared I shouldn't have risked trusting any of your nation anew… but I took a gamble with you, and you did not disappoint. Where I have seen much of the worst of humanity… I appear to have discovered the best of it, through the two of you."

"That might be too flattering," Azula smirked. "We're hardly upstanding in every sense…"

"Indeed. Ensure not to sully my Library with improper acts this time."

"H-hey!" Sokka squeaked. "We weren't doing anything that bad! I mean, well…!"

"He walked in on us getting slightly too comfortable in his planetarium room, Sokka: he's not going to forget that," Azula said, with a dry grin.

"Indeed," Wan Shi Tong confirmed. Sokka's cheeks flushed. "That being said, you have been rather successful across the years, building a family, bringing back the dragons, as you promised… you reclaimed peace in a world that seemed beyond all hope. While I remain vigilant, and the Preservers will continue to keep tabs on all who may enter the Library's premises, I find myself at new ease with your kind. History shall always remember what humanity owes to the both of you. I will make certain to make records of it."

"Thank you," Azula bowed her head. "And… for letting my family browse your collection. We told them what a great honor you had bestowed upon us by allowing this. I know they're hardly the most disciplined children…"

"We'll keep an eye on them anyway," Sokka smiled reassuringly. "Thanks, Wan Shi Tong!"

"It is I who thanks you. Truly."

Wan Shi Tong bowed towards them, stunning Azula with the gesture: he spread his wings after, taking flight across his Library anew.

The place truly was different compared to Azula's last visit: the whole place appeared brightened with knowledge, with renewal, with the promises fulfilled between the regal couple and the ancient spirit.

"So… what do you think?" Sokka smiled, throwing an arm around Azula's shoulders. Xin Long shook his head before pressing it against Sokka's chest, startling him. "H-hey! He's gone, no need to be scared anymore…"

"He's thanking you," Azula smiled, reaching over to stroke her dragon's fur. "For everything you've done for this place… and, of course, for successfully fending off the big owl, too."

"He'll never stop being unnerved by him, I'm sure," Sokka chuckled, hugging both Azula and Xin Long with each arm. "So… what section do you guys want to start with?"

"How about we find out if anyone has written stories about us yet?" Azula smirked. Sokka snorted. "I'm curious! There's bound to be so many outlandish tales about how on earth you and I wound up together…"

"I'm sure there's a lot of sordid, raunchy ones too…"

"Eh, well. Either we've already done those things, or it'll serve as useful research for the future, right?"

Sokka snorted and cackled: Azula's mischief never failed to delight him.

They took off together, meaning to explore the place on their terms, to enjoy themselves, keeping tabs on their kids while under the watchful supervision of the Preservers, who greeted Sokka respectfully: humanity had succeeded at reconnecting with its most ancient valuable knowledge, and they had finally learned the wisdom, as well as the discipline, to honor the vows that had finally built true peace between the imposing owl and humanity at large.