In the sixth episode of the Ahsoka series on Disney+, more than fan-favorite characters only seen in animation previously made their live-action debut. Of course, all eyes are on Grand Admiral Thrawn and the taller, bearded Ezra Bridger both introduced in Star Wars: Rebels. However, there were other characters from the cartoons seen in their all their blood-red robed glory. First introduced in The Clone Wars, the Nightsisters didn't just make their live-action debut in Ahsoka, they were revealed to be much older than fans thought.
Source:https://www.cbr.com/ahsoka-nightsisters-explainer/