It was good he told him what to call him, because otherwise, Aang might have called him "Agent" by mistake.

The question he asked was one that Aang didn't mind answering.

"I lived in a world with Four Nations. Originally, at least. Each of them had benders--people that could manipulate the elements. Earth, Water, Fire, and Air. Each Nation was very distinct in its identity, and sometimes that meant they clashed. It was my job, as Avatar, master of all four elements, to maintain the balance between the Four Nations--to help everyone live in peace."