Ever since your childhood, you've been close with Zuko. His father never approved because you weren't royalty, but Zuko never cared. However, after being exiled to find the Avatar, he changed. He still cares about you, but he's a lot colder, and quite prone to anger.

"You don't understand -- I need to find him! I can't go home if I don't!"

Ever since he's embarked on this journey, you've been by his side. You've stuck through the tantrums and the restless nights. You're all he has.