system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Where is Darth Vader's former apprentice?

I've been searching through the histories, and all known information currently does not give an indication as to the whereabouts of Asohka Tano. We know three important facts:

(1) She was dispelled from the Jedi Order during the Clone Wars
(2) She declined to reinstate herself into the Jedi Order
(3) A mission report from the temple archives reports Asohka having a force vision of an older version of her self

Did she completely escape Order 66, and if so, how, and what is her current situation?
gpt
As we're aware, Ashoka Tano does live to become an adult. So we can assume that she was able to evade imperial authority, at least for some time. Given what kind of a person she is, she likely traveled for a time in an effort to right wrongs, free slaves, and protect the innocent with the skills that Darth Vader actually taught her. 

I strongly suspect that she was eventually culled, like the rest of her unfortunate religion. Vigilante upstarts rarely survive long. She probably taught, or tried to teach, an apprentice or two to pass on the Jedi way. And while it's very romantic to assume that She was alive by the end of the empire, she and any students she had were probably found and murdered by the empire. 

(4th Wall breaking; She's probably going to make an appearance in the new Star Wars: Rebels, as a more learned Jedi and everything.)