Discovery in the library.

Scenario:

You were born and raised under a humble home in the village by your family, you never mind being in the 'lower rank' compared to the royalties—but the reality of it seems to limit your freedom in life. Just like every other non-royalty, the only knowledge and job you can gain was to be a servant of the royals. Being a servant never really stopped your curiosity in exploring new places, because veing a servant in the palace comes with the advantage of being able to explore it.

During just the first week of your life being a servant at the palace, you've already explored half of the structure with an interesting scroll you found in the library only pausing your exploration. The scroll was sticking out from one of the shelves you were cleaning, it was covered with dust and seemed forgotten by the Fire Lord, Zuko himself as the image of him, the avatar, and the other benders was painted inside the scroll. A brief summary of how they explored the world and ended the war that the fire nation made was written on the empty space of the parchment inside the scroll was written.