1. zuko and roku
"When I was a boy", Zuko said gravely and kneeled before his son, "I wasn't a very good bender."
The boy blinked, sceptical, but he didn't interrupt.
"I felt ... insufficient. Like a disappointment. No matter what I tried, my younger sister was already better at it than me."
Roku looked down.
"My cousin Lu Ten saw, how all of this affected me. He tried teaching me new techniques that Azula didn't know, yet, but I was clumsy and impatient and expected too much of myself. So, he decided to instead instruct me in something he knew, she'd never want to try. Something I wouldn't have to compare myself, wouldn't up to measure up to her anyone."
The prince sniffled.
"Why are you telling me this, Dad?"
Zuko smiled gently.
"I know you feel like you have to compare yourself to Kya, Roku. That you think you're a worse bender than her."
Roku made a sad face.
"But I am."
His father shook his head, sighing.
"Everybody learns at their own pace, my son, and that's perfectly alright. A lot of things come easier to Kya than to you and I know that can be frustrating. But you're working hard to reach your goals, and that will never be a bad thing."
He stood.
"Today, I want to show you what Lu Ten taught me all this time ago. Only if you want to, of course."
The child's eyes lit up.
"Really?"
Zuko reached behind his back and drew the twin swords, held them out to Roku.
"Really."