És itt azt írják hogy nem is Lucas találta ki Ahsokát.

https://www.starwars.com/news/designing-star-wars-ahsoka-tano

"Supervising Director Dave Filoni’s original vision for the series, scribbled on a piece of lined paper, involved a band of misfit scoundrels aboard a freighter and operating on the fringes of the galactic conflict. It would have included a Padawan Learner named Ashla, and her Jedi Master on assignment with the crew ...

But before the idea came to fruition, George Lucas stepped in, offering a guiding hand to bring Anakin and Obi-Wan Kenobi back into the spotlight to explore the heat of the battle with characters that already had a foothold in the war. Ashla became Anakin’s Padawan, Ahsoka"

Szóval Lucas ennyit mondott hogy legyen Anakin tanítványa, és hirtelen a net azzal van tele hogy GL és Filoni közösen találták ki. 
Na így működik az álhír terjedése és elfogadása.