system
Given the following post, respond as if you're commenting on Reddit:
human
[A:TLA] Why didn't Piandao recognize Zuko?

Zuko learned swordsmanship from Piandao, according to a comic, why didn't he greet him? Is Piandao bitter from being forced to train him?
gpt
Sokka was definitely a special case for Piandao, being the Avatar's friend and also a... unique student. Zuko's relationship with Piandao is never explored, but given the workings of the Fire Nation in that period, I'd say it was probably a lot more of a working relationship than an actual mentor-student dynamic.