Did Aang run away for the same reasons in the Gaang age swap au or did he get caught in the storm looking for a waterbender master?
In the age swap AU, Roku’s death happens four years earlier, meaning that Sozin has to wait those four extra years tonise thencomit to go after the Air Nomads, and as a consequence, he takes a little longer to get the ball rolling on his imperial conquests and the Air Nomads feel secure enough to wait until Aang is the traditional sixteen to tell him that he is the Avatar. However, they also feel the winds of war blowing, and want to keep him close to home for fears of assassination. Suddenly, Aang’s life gets much more restrictive as they write to the Northern Water Tribe to send a master to them. Bored, lonely, and facing his mentor being sent away for being a bad influence, Aang decides to show them that he can look out for himself by flying to the South and finding a master by himself, his own way.
Well he certainly does find a waterbending master his own way.