From Tumblr user 112aang:
Katara shows her feelings for Aang in “the puppetmaster,” and this episode also has some heavy kataang moments.
Now, many people probably don’t see anything in this episode that shows katara showing feelings for aang. Or that it doesn’t even hold kataang moments at all- but, it does.
At the very beginning when they are telling stories around the campfire, they’re all pretty scared after katara’s story. But what I want to talk about from this scene, is when toph hears the people under the mountain. Aang, katara, and sokka hug each other because they are scared. After sokka let’s go, aang continues to hold onto katara, and I see it as him being scared himself, but also trying to protect her. She leans into him for safety, to show that she trusts him.
Now, let’s skip a little bit towards the end of the episode. Katara’s fight against hama is so legendary, and very amazing. You might be asking yourself, “but, where in this entire sequence does katara show her feelings for aang?” Well, i’ll tell you. When aang and sokka try to join in on the fight against hama, she bloodbends them in order to use them against katara. As she dodges each of them, katara freezes aang to a tree, saying “im sorry, aang.” Aang then proceeds to say, “it’s okay.” He’s literally frozen to a tree, and just doesn’t care. Anyway, back to katara showing her feelings… After this moment, when hama sends sokka and aang flying towards one another, she intends for sokka to kill aang. She doesn’t know (we can assume) that aang is the avatar, much less even has bending. So she is inevitably sentencing aang to death by sokka’s sword. This leads me to my point: when katara chooses to bloodbend as the only option, she does it to save aang. Not sokka- aang. There is no way in this scenario, that aang could hurt sokka. Therefore, she is saving aang. She openly shows her feelings for aang as she screams “no” and bloodbends hama. She doesn’t want to see the boy she loves, her best friend, be killed right in front of her, and she can’t stand losing him.
Now, to my next point: we end the episode with kataang comfort. Notice in the outward scene, as katara falls to her knees crying, it is aang who consoles her. Sokka is there, but he’s a bit off to the side. It is aang who sits by her side and hugs her as she breaks down. This is something that is so beautiful about kataang- the constant comfort they provide for each other. I could go on and on analyzing these many, many scenes in which this occurs, but let’s save that for another post.
In conclusion, kataang can be found in every single episode, whether it be obvious, like the “kataango” in the cave, or the subtle moments like the ones I described. They truly are amazing.