The many emotions exhibited by Katara, as observed by Sokka.

Joy:

It was during a pleasant spring morning when he saw his sister arrive for breakfast with the most blissful expression he had ever seen. He was thoroughly confused and disturbed as she giggled giddily and sighed dreamily at random intervals.

It was only after he learned that Aang had just proposed the previous night did her behavior make sense.

(Oh, well, that explains everyth—wait, WHAT!?)

(Cool it, Snoozles. At least they didn't have sex…….that's gonna happen on the wedding night.)

Sadness:

Sokka and his second son saw Katara desperately hold back tears when she and Aang watched their eldest child and a couple of friends depart on their own journey.

It was a rite of passage into adulthood, their eldest said.

The Waterbending Master was entirely against the idea, even if it was with friends. It was only after much persuading from Aang did Katara finally reluctantly agreed.

Katara had kept her eyes on the ship until it was no larger than a speck in the horizon. Aang, with a warm smile, had tenderly wrapped his arms around the emotional mother from behind, lovingly placing a few kisses on her neck.

When the ship was entirely out of sight, Katara turned around in Aang's embrace and buried her face in his chest, and let loose a few of the tears she had been restricting.

The two parents stood there, holding each other, with the ocean of the South Pole in the background.

(Ewww……, grownup-cooties.)

(Hehehe, that's my son.)

Fear:

To this day, Sokka had never seen his sister look as terrified as she did that day, the day Ba Sing Se fell, when she carried the lifeless Aang onto Appa, hair unbounded and flailing, eyes wide with distraught, and cheeks marked with twin trails of dried tears.

He had frozen at the sight, mentally unprepared to see the Avatar, his friend, for all purposes, most likely dead, not alive, dried blood staining his torn clothes, not coming back, his back charred and smelt like roasted flesh, and dead, dead, dead, dead, dead, dead, dead.

Apparently, that was what Katara thought too, because she had looked like she was about to scream hysterically and cry until she was just as dead.

By some miraculous power of the spirits, she managed to stay composed enough to use her water from the Spirit Oasis and to heal Aang's mortal wound.

When nothing had happened, Sokka felt as if all the air in his lungs emptied to be replaced by absolute panic. But then the boy's arrows glowed and he lived, staying conscious enough to give the girl holding him a faint smile.

To this day, Sokka had never seen his sister look as overwhelmed and relieved as she did that day when she hugged the boy that came back from the dead.

(And that's why the Avatar and Fire Lord Zuko are 'scar buddies'.)

(That's stupid.)

(Go to your room.)

Jealousy:

The world was finally advancing steadily toward universal peace.

As if to signify this, there were less conferences and meetings between figureheads and more parties thrown by whoever and whenever.

It was around the time Sokka had proposed to Suki (he failed epically, but the Kyoshi warrior just giggled and accepted). The Gaang was attending a party organized by an Earth Kingdom noble for reasons he could care less about in favor of succulent meat, and he was dancing merrily with his betrothed.

He had noticed out of the corner of his eye that Aang was dancing courteously with several different girls over the course of the party.

This had been no surprise, as he once overheard a group of giggling Earth Kingdom damsels describe the teenaged Avatar to have upgraded from 'glomp-worthy' to 'down-right-sexy'.

And so many maidens of single status and of marriageable age (and some that weren't) had requested a dance with the airbender, who, in Toph's opinion, was too much of a wuss (read: polite) to decline.

He and Suki had laughed quietly at the young Avatar's predicament of fending off his various dance partners' attempts of subtle seduction.

However, Katara reacted rather differently to the same observation.

As an older brother who was familiar with his sister's more negative emotions, he immediately identified the expression as UNHAPPY.

She was also dancing with some random Earth Kingdom bachelor, but her attention was glued to Aang and whichever floozy (he swore he could hear Katara using that word via sibling telepathy) that decided to latch onto the lad, with one of her eyes twitching periodically.

Really, she had started out fine, understanding and willing to tolerate. But as Sokka was aware of, there was a limit to his sister's patience.

The straw that broke the bison's back was when a girl decided it was appropriate to plant a kiss on the Avatar's cheek as way of thanks for the dance.

Another song was starting, and another girl began to approach the young man, but she was unable to reach her goal as the dark-skinned waterbender intervened by wrapping her arms around a startled Aang.

The clincher came when Sokka saw Katara glare at the suddenly frightened maiden, and GROWLED.

The poor girl had 'meeped' and backed away slowly, as if confronted by a dangerous, carnivorous animal.

Satisfied with the opposition's retreat, Katara then dragged Aang, who looked confused but obviously amused, away from the dance floor and out into the night for, most likely, a private party.

(I can't believe I just saw my sister become a ferocious beast of feminine fury.)

(I can't believe nobody died.)

Surprise:

Sokka remembers (as if anyone could forget) the day when he and Katara discovered the iceberg that contained the savior of the world. He remembers the look of fascination and awe on his sister's face when she saw the ethereal glow within the prison of ice. He remembers the astonishment they both felt to discover a boy to be entrapped within, and an airbender, no less. He remembers how they were both undeniably pleasantly surprised to find out that the boy was the Avatar.

And he remembers all of this as he watched his sister and the man who was once the boy from the iceberg become man and wife.

(Wow. You must've been pretty surprised back then when you found out you've dug out the Avatar from an iceberg.)

(Actually, I'm pretty surprised right now by the fact that what we really dug out of an iceberg was my brother-in-law.)

Anger:

Sokka had always thought that he saw the absolute peek of his sister's anger the day Zuko had followed them to the Western Air Temple and tried to join Gaang, to which Katara responded with attempted murder.

This thought was overridden years later during a council meeting at the Fire Nation, where a general had suggested that Aang, as the sole surviving airbender, should take upon multiple wives to produce more offspring in order to revive the Air Nation.

He was acutely aware of the drop in temperature in the room, and the tangible aura of RAGE.

He heard Toph cackle somewhere in the back of the room.

He saw Aang looking nervously at the enraged girl beside him.

He heard Zuko choke on his tea, and saw him reliving a bad memory.

He saw the foolish general's eyes began to flicker, and understood that the old man's life was flashing before his eyes.

He himself wished he had stayed in bed.

(WE'RE ALL GONNA DIE!!)

(Very encouraging, Flaming Lord Hotman.)

Love:

Sokka had been waiting anxiously and fidgeting, his eyes fixated upon the entrance of the structure where a magical and terrifying event was taking place.

There were loud grunts, pained cries, boisterous shouting, and all assortments of uproarious, discordant human clamors.

He had winced at the painful sounding groans and felt sweat forming under his eyebrows, only peripherally aware of Suki placing a comforting hand on his shoulder.

Despite how timeless the entire ordeal had felt, it was suddenly over when a distinct-was-not-there-before cry pierced through the night air.

Sokka had perked up, and looked to Suki, who had an equally excited look upon her pretty face.

He then waited even more anxiously, for someone, anyone, to give the people waiting outside the go-ahead to enter and witness the birth of a new, special life.

But Sokka was never known for his patience. Ignoring Suki's protests and his own senses, he had charged towards the pavilion with unrestrained vigor, intent on witnessing the result of the event firsthand.

He did.

He saw Aang, grey eyes sparkling so much and smiling so wide that his face was not big enough for it, and his eyes were practically forced to squint slightly.

He saw Katara, looking tired and worn out, but ALIVE and GLOWING with something akin to what he remembered seeing in his mother, eyes tender and adoring.

And there, between the two so precious to him, was the bundle containing the sleeping form of the new, special life.

Neither of them had noticed him, completely absorbed in their newfound world.

He saw the midwife smiling at the new family.

He heard Suki gasp and most likely tear up behind him.

He heard Toph making muffled complaints and restrained demands to know the happenings.

He saw the glow of the love that his sister was radiating. The love for the man beside her, and the love for the infant cradled in her arms.

The midwife had approached, nodded to him, and left, and he had understood.

He ushered everyone away, having more difficulties with Toph, who threatened to crush him with a boulder and use his remains to feed insects, to give the family some moments away from the world.

He had been impressed by his own patience, knowing that he extremely wanted to meet his new relative.

But he recalled the love in his sister's eyes, and knew that he was unwilling to disturb the humbling sight that would be forever instilled to his memory,

(By the spirits, I can feel the fluff all the way over here.)

(WARGL!! WARGL!!)

(What the!? Who the hell invited Crazy Foam Guy!?)

AN: I can't believe it, but I'm completely into Avatar: The Last Airbender. I remember dismissing the series when it just began, but after actually watching it……well, here I am, writing fanon for it. Anyways, review if you want, I'll be updating whenever a muse hits me, or if given eyebrow-raising worthy suggestions. Most of these oneshots will be humorous, I believe, because I don't like angsty stuff. Pairings, if any, will be various, because that's what makes it interesting.