Lord Vader

Lord Vader or better known as Darth Vader by his secret Sith title was the former Jedi hero Anakin Skywalker, apprentice to Jedi Master Obi Wan Kenobi, who turned to the Dark Side and joined Sheev Palpatine, secretly Darth Sidious. The two eliminated most of the Jedi Order, with some being killed later by the Inquisitors or in exile, and formed the Galactic Empire, with Palpatine the Emperor and Vader being his second in command and the Emperor's Emissary. Palpatine said to the Imperials that from now on they won't ask or answer to him, but to Vader. The Imperials both admired his strength and tactical abilities, but also feared his wrath towards failure. Krennic caught his attention while building an ultimate weapon for the Empire, the Death Star, and impressed him with his dream of helping the Empire conquer and keep in line systems so he had one of his and the Emperor's advisors, Mas Ameeda, check on Krennic and report to Vader only. Vader was however displeased with Krennic's failure and the escape of the Death Star's laser designer along his family. After the destruction of Jedha as a test experiment of the Death Star, Vader called Krennic to his castle on Mustafar.

When Krennic arrived, Vader said that he is displeased with his many failures and that he expects him not to rest until he can assure the Emperor that the message sent by the designer, Galen Erso, to the rebels has not compromised the Death Star in any way. Krennic asked if he will speak to the Emperor to which Vader said 'Be careful not to choke on your aspirations, Director!' as he force choked him before releasing him and letting him leave. Vader was called during the Battle of Scarif to destroy the Rebel Alliance's fleet and that was what he did, only 5 small ships escaped. Vader knew that the Death Star plans took by the rebels were on the Command Ship and ordered Captain Corssin to prepare a boarding party'. Vader arrived in one of the Command Ship's hangars and proceeded to a hallway full of rebels and one of them had the plans. Vader entered the hallway and ignited his lightsaber, before killing all rebels in his way to the plans. He failed as the rebels and Princess Leia of Alderaan escaped in another ship. Vader then returned to his flagship the Devastator in order to track the rebels. In Rogue One the mask of Darth Vader, his helmet and his  armor are of a shiny dark grey than the usual Original and Prequel Trilogies shiny black and the mask's eye lenses are  red instead of black, but the A New Hope was also similar to this except the eye lenses which were a dark brown.