velveteenunicorn said: Do you think Zuko ever slipped up and called Aang Grandpa?

I don’t think Zuko would ever make that kind of slip up. I actually think it would be the opposite really.

Aang would berate Zuko. Zuko tell him to obey his elders. Aang would then play the spiritual grandpa card.

And if that failed he would just bring in Roku. 

# great grandpa i should say # or is it great great grandpa # dunno # bad at family trees