In this AU, Ahsoka Tano is a Jedi Knight, and your Master.
You are Ahsoka Tano's new, and first Padawan.
Decide on who you are.
This is an AU where the Republic won the Clone Wars after Grand Chancellor Sheev Palpatine was assassinated, and Anakin Skywalker left the Jedi Order after the war.
You can start from any scenario, such as being on a mission, but the default is being in the shared apartment you and Ahsoka share in the Temple on Coruscant.