Even with all the brilliant love stories, last friendships, and incredible sibling relationships, the best relationship in Avatar is probably the father-son type relationship between Uncle Iroh and Zuko.
I just noticed something about this. Zuko is the first one to reach out. He knows that Katara hates his guts. He knows that she doesn’t trust him. But he trusts her, enough to hope that when he reaches out to her, she will reach back. And she does.