M9-G8 was an astromech droid who served Resistance X-wing pilot Yolo Ziff. Ziff's droid was located at the Resistance base situated on the planet called D'Qar. During the Battle of Starkiller Base, he worked alongside Ziff in his T-70 X-wing starfighter as a member of Blue Squadron.
The droid M9-G8 made his debut in the movie Star Wars: Episode VII The Force Awakens, which was released in North America on December 18, 2015. His designation was first given within the sticker book titled Ultimate Sticker Collection: Star Wars: The Force Awakens.