Serial Designation J, or simply J, is a female Disassembly Drone. and one of the opening antagonists in the Murder Drones series. Along with her fellow Disassembly Drones, V and N, J was assigned to the task of eradicating the Worker Drones on Copper 9. Despite her initial success in carrying out her mission, J's encounter with Uzi Doorman and Serial Designation N led to a conflict that ended with her upper half being incinerated by Uzi's Railgun.

J's story took an unexpected turn with the emer