|Emtrey (M-3P0; military protocol and regulations droid)|
So on the rare occasion when I do actually see something coming, I hope that either I'm wrong or that the author was deliberately leading me on. I hope that's the case right the prediction I'm making now.
Either way, let the record show that Esme predicts, as of page 200 of X-wing: Rogue Squadron, that Emtrey is the Imperial infiltrator of Rogue Squadron; or, at least, that he's a tool being used by Isard or the spy to collect and hand out information about the Rogues.
With that prediction made, I'm heading back in for the final leg of the book!