Toph
I leaned against a rock wall, chewing on a stem of grass. Twinkle Toes was off having his lessons in splashing with Sugar Queen. I didn't have anything to do, so I just situated myself for a good long think.
The two of them could just spend hours together. You'd think they'd get bored or something. Humph. As if. I don't think I've ever seen…well… heard anybody more obviously in love. I asked Sokka about it once, and he laughed. "That about sums it up," he said, "the worlds most stubbornly in denial love-struck lovebirds."
I snorted. It seemed strange, why they couldn't just say it. I didn't bother asking, cause I knew they probably had all their excuses planned out.
You'd think they got enough of each other during their "lessons." Nope. Apparently, they think of each other at all the moments in between. The other day, Katara asked me what I thought Aang would be when he grew up of all things! I mean, it just seemed obvious to me, but maybe it's true that it's hard to see what you hold too close to the heart. I told Katara that she had nothing to worry about.
It was obvious to me. He would grow up to be a sensitive person, very powerful but gentle. He would never be fierce, and probably not very stubborn, though, if you dug deep enough you found it buried in there. (I remember how I had to dig to find it. He's an earthbender, so it had to be in there somewhere.) He would always have those strong, wild emotions, but he would learn to tame them, probably with Katara's help.
He might lose some of his childishness, but that was a part of growing up. He would become more mature and responsible in time. He wouldn't lose his bubbly spirit or innocence; those were too big a part of who he is to be lost completely. He might have some big personal change that altered who he was, but somehow he would still shine through. That's just the way he is.
Katara has nothing to worry about.
Sokka, however, might.
In case you didn't get that last part, reread the last paragraph of chapter one.