Star Wars: Darth Vader and the Ghost Prison #4

Laurita Tohm's plan to recruit the prisoners from the Prism to take back Coruscant is set in motion in Star Wars: Darth Vader and the Ghost Prison #4.  After being released, Darth Vader orders the prisoners to fight to the death and Tohm is nearly killed in the melee but is saved by a prisoner, Captain Shonn Volta.  After numerous prisoners are killed, Darth Vader declares an end to the conflict and Moff Trachta gives a speech about what it means to be an Imperial.  All of the prisoners kneel when asked except for Volta, but Tohm pursuades her when he tells her after she helps kill the traitors on Coruscant she can choose to join the Empire or go free.  As they prepare to leave the Prism, Vader orders Tohm to kill the badly wounded surviving prisoners using just a sturdy rod.  Afterwards, Tohm stumbles onto the Emperor's transport, sick from what he had just done, and Trachta shares his insights on Vader:

Moff Trachta: I have great respect for Vader.  And a healthy dose of fear.  He is an unmatched warror, and unwavering in his loyalty to the Emperor.  But he is a blunt instrument.  He solves every problem with a lightsaber.&nbps; He never admits his own mistakes.  He has no need of allies -- -- and he certainly has no interest in mentoring anyone.  At Vader's side, you will only learn how to serve.  Come to me when you're ready to learn how to lead.

Meanwhile on Coruscant, Headmaster Gentis has revealed the secret project, the Death Star, to his fellow conspirators.  He explains the important of capturing Grand Moff Tarkin to learn more about the superweapon before executing him.  Once Tarkin is killed and they announce the Emperor is dead, he expects to be declared the new Emperor.  Back on the transport, Tohm is testing Volta and she explains her hatred of the Republic.  She had studied to be a hyperspace engineer before circumstances forced her to join the Separatists and Tohm siezes on this information to ask her if she can predict where a ship might exit hyperspace.  She tells Tohm she can and the issue ends with Tohm declaring they have a ship to catch.

Dave Wilkins' cover shows Vader flanked by Laurita Tohm and Moff Trachta as the intense prisoner battle rages around them.

Star Wars: Darth Vader and the Ghost Prison #4a - Dark Horse Comics, U.S. (August 2012)

Grand Moff Trachta first appears in Star Wars: Empire #1 in 2002, the first issue in the 4-part Betrayal storyline.  Unfortunately, Betrayal and this series, which chronologically takes place earlier, are the only meaningful appearances of Trachta.  Marvel has reintroduced Legend characters from their original 1977 series into canon, but I wish they would consider using Legend characters that were created when the license was held by Dark Horse.  Trachta has an compelling background and is visually interesting; there are undoubtably more stories that can be told using him.