"Granddaughter"

Pakku POV, between eps 18 and 19.

Pakku was surprised he didn't realize Katara was Kana's granddaughter sooner. The same hairstyle, the same large blue eyes, the same pigheadedness. She was the spitting image of Kana, both in looks and in obstinate personality.

The waterbending master watched Katara as she fluidly practiced her moves. He wondered...if Kana had stayed, would they have had a granddaughter like Katara? Pakku imagined telling a smaller Katara stories, letting her sit on his knee, and—much as he abhorred the thought of women learning waterbending—maybe teaching his granddaughter a few little tricks. A small smile came to his face, despite himself.

Master Pakku's thoughts were interrupted when he felt a snowball hit the back of his head.

"Avatar Aang! What in all the glaciers do you think you are doing? Why aren't you practicing?"

"I finished practicing! I told you that already twice, but you weren't listening!"

"THEN PRACTICE THEM AGAIN!"