Captain Shaef Corssin

Shaef Corssin was the captain of Lord Vader's flagship the Imperial I class Star Destroyer Devastator. He was noted by Vader to be a competent officer and fiercely focused in his work to the Empire.

Battle of Scarif
Corssin captained the Devastator under Lord Vader during the Battle of Scarif. He commanded the destruction of the rebellion's fleet on the orders of Lord Vader and told his superior that the rebel flagship known as the Profundity had been disabled by their fire and that it received the transmission of the Death Star plans from the planet's surface. Lord Vader then ordered him to prepare a boarding party to land in the enemy ship's hangar in an attempt to get the plans back.