Grand Admiral Thrawn
Taking the loss of his Star Destroyer personally, Tarkin orders that Maketh Tua be brought before him for her failure to find the Lothal rebels. Knowing the true meaning behind the summoning after the deaths of Aresko and Grint, Tua attempts to defect, but she is killed before she can leave Lothal. Tarkin later appears in the season three premiere where he meets with Governor Pryce (Mary Elizabeth Glynn) regarding the Lothal Rebels. He subsequently grants her request for use of the Seventh Fleet, commanded by Grand Admiral Thrawn (Lars Mikkelsen). Tarkin appears via hologram in the season three finale, being briefed on Thrawn's imminent attack on Atollon to stymie a coordinated Rebel attack on Lothal. Towards the end of season four, he warns Thrawn that he must prove the worth of his TIE Defender program, Thrawn's prototype design of a new Imperial Star Fighter, or it will be shut down in favor of diverting resources to Krennic's "Stardust project" - which would eventually become the Death Star.