Smug
Katara was seven, playing with her friends and brother, when the idea was first brought up:
"You're gonna marry Zuko," said a five year old Toph in a sing-a-song voice.
A disgruntled Katara replied, "I am NOT!" And to prove her point, shoved a nine year old Zuko in a mud puddle. Zuko, for his part, was very confused, and after wiping the mud out of his eyes, muttered, "Girls are crazy."
The Subject was mostly forgotten for the next few years until a new boy, Aang, moved into the neighborhood:
"Why do you keep glaring at the new kid?" asked a 13 year old Sokka.
A 13 year old Zuko didn't respond except with a grunt and a shrug before returning to glaring at a slight oblivious Katara and an obviously crushing Aang.
"If you like her so much why don't you marry her?" sing-a-songed Sokka.
Zuko too a momentary break from his glaring to glare at Sokka, roll his eyes, grunt, then return to glaring at Aang.
The Subject was again dropped until Katara's freshman year:
"So are going to the dance with Zuko?" inquired a 13 year old Toph.
"Maybe"
"I still think you're gonna marry him."
"Oh shut up," Katara said as she blushed, "You're gonna marry Sokka."
"Maybe I will," Toph replied with a smirk.
It wasn't until Zuko and Katara's engagement party six years later that The Subject was brought up again:
"You know Zuko, I've always said you were gonna marry Katara," mocked Sokka.
"I know, I know," Zuko said as he rolled his eyes and turned back to his fiancé, "No need to be so smug."
