Marg Sonat was a male Ithorian gangster who was employed by the crime lord known as Sard Nightbringer.
Sonat's presence was recorded at the Shoten Lounge on Rantine Space Station where he encountered two spacers. He contracted them to move a sizable crate aboard their freighter, transporting it from Rantine Space Station to its destination, Kwenn Space Station. As the spacers prepared their vessel, Sonat conferred with his superior, Sard Nightbringer, regarding the scheme to auction off a personal shield generator of an experimental nature. This generator had been acquired through looting from Imperial Research and Development Station T-1583. The intent was to utilize the auction's earnings to compel the Empire's withdrawal from the Tamarin sector. He voiced his concerns about her strategy, desiring instead to use the funds for his own personal gain. Subsequently, he engaged with Pari' Notgoth, persuading him to collaborate in a plot to seize both the device and the credits following the auction. Sonat then plotted Morgotou's assassination, intending for Notgoth to assume his position at the auction.
After boarding the Stellar Mermaid, Sonat was present at the auction, and he escorted the unsuccessful bidders from the room following Natja's successful bid. Subsequently, he sabotaged the vessel, resulting in a hull breach that caused Nightbringer's death.