Birth of the Sentinels

A.U. Bastila is only a couple of months younger than Revan. Bastila Shan is a Jedi Knight that is constantly disobeying the Jedi Council, so it is no surprise to anyone that she wants to go and help the Republic to deal with the Mandolorian War, they didn't expect her to vanish when the war actually started though… and they didn't expect Revan to follow her