[UPDATE: I have been corrected on Twitter: it is GRAND Admiral Thrawn, and I should keep that in mind. So noted.]
Come, I will conceal nothing from you: I’m not really what you’d call steeped in Star Wars lore, particularly when it comes to all that Expanded Universe stuff that got tossed out the airlock. But I’ve heard of [GRAND] Admiral Thrawn nonetheless: he was one of the big ones, right? One of the ones that fans really objected to being summarily dismissed? Welp, they brought him into Star Wars Rebels.
So you guys get that, at least.