I'm really hoping Korra and Katara are close, so in my headcanon, they are.

And...yeah.

Every so often, Katara receives a letter from Korra. Usually, they are brief and simple, and Katara suspects she writes them in between adventures: outings with her friends (Mako and Bolin, she'd mentioned), Airbending training (which were long and tedious to the Avatar), fighting Equalists (which she admitted, only to Katara and on one occasion, Tenzin, never ceased to fill her with terror), playing in Pro-Bending matches (much to her son's chagrin). The writing was casual and highly personal, like their relationship usually was, all the same.

So when a White Lotus guard hands her Korra's latest letter, she is not expecting much, though the prospect of hearing from her former student brightens her day all the same.

She opens the letter, surprised to find writing from the very top of the parchment scroll to the very bottom.

Dear Sifu,

Airbending training has been getting better, believe it or not. I can finally get through those damn gates in one piece, and then get them to spin with Airbending now! It's not much, but hey, it's a start.

Also, we won the Pro-Bending tournament, so Mako and Bolin can pay their rent and don't have to worry about money for a while—I told you about how they used to live on the streets, right, Sifu?

Oh and also, Mako? Weepiest. Drunk. Ever. Damn it, you can't take that guy anywhere! Okay, that's a lie, he's a good friend, even though he sucks at talking to people and makes an ass out of himself a lot.

(But…I might actually like him…which is kind of a strange and terrible feeling.)

But moving on to something more important:

I talked to Aang for the first time. It was while I was sleeping last night, I guess he summoned me into the Spirit World or however that works? Well anyway, we talked for a while. He wishes he could have met Pema and been at their wedding, and then meet Ikki, Jinora, and Meelo. And then somehow, he got to the topic of love and how "I see you've been spending a lot of time with that Mako boy, Korra…" and then he suggested that I take him penguin sledding, of all things. I'm still not sure if he was joking or not, but I told him that the only penguins in Republic City belong to the zoo, and I'd rather not be arrested by Chief Bei Fong for the second time this month, and that Mako would probably pee his pants if he had to get on back of a penguin, anyway. (Though I'm sure it's an in-joke between the two of you, because he started talking about you right after he said it. In which case…you sure know how to pick 'em, Sifu.)

He told me to tell you that he misses you. A lot. And I'm sure that you miss him just as much. He went on to say that he had this selfish wish that you'd join him soon, even though your family and I would miss you when you…go. But I think it's selfish of me to not want you and Aang to see each other again, because that means that you'd just be gone and then…I'd miss you an awful lot, Sifu.

Well, I think it's about time I shut up, so I'll write to you another time.

Korra.

Katara rolls the parchment back up and smiles a small, reminiscent smile, feeling tears well up in her eyes.