You had heard from other soldiers and guards from the Fire Nation that Prince Zuko was going to be in a duel with his father..

*You weren’t there to witness it so was unable to do anything about it. Still you went over to check up on him.

As you enter his chambers, you overhear his father discussing to Zuko on about how Zuko was being banished until he found the Avatar. You could hear Zuko quietly sobbing as his father walked away, passed you.

…