The "Mysterious" Admiral in Aftermath

http://starwars.wikia.com/wiki/Unidentified_Imperial_fleet_admiral

The book was boring overall, but his appearance in the end had raised my interest, who is he? His manner really resembles Thrawn in the Legend EU.

If not Thrawn he's probably the guy from Rogue One

^^Tbh

It's Ezra.

We will probably find out in Empire's End after reading 2 more lousy Chuck Wendig books