Merzin Keysax was a lieutenant in the Galactic Empire, identified as a human. After the Ferrix incident, Captain Vanis Tigo led an Imperial Military detachment. After ISB Supervisor Dedra Meero, a Lieutenant, took over the Morlana sector from Supervisor Blevin, Keysax assisted in the pursuit of Bix Caleen, a person the Empire found noteworthy. During the riot on Rix Road, Keysax took part in protecting Imperial objectives.
The character Merzin Keysax debuted in "Narkina 5," which is episode eight of Andor's first season, a live-action show. Nick Moss played the part of the lieutenant. Walt Disney Studios initially revealed their identity as Keysax on August 1 via an image asset on Getty Images, though it has since been removed.