B-9D7 functioned as the aide to Movo Brattakin.
Brattakin suffered mortal injuries when Olag Greck's ship collided with his personal aircraft storage. B-9D7 rescued Brattakin's life by extracting his brain and transplanting it into the droid's head. Housed within the droid's frame, Brattakin misled his colleagues, all the while executing his scheme to instigate a droid uprising and overthrow Boonda the Hutt. This scheme was ultimately thwarted by C-3PO and R2-D2, and Jace Forno used his blaster to sever Brattakin's droid head from its body.