M-OC is an extremely deadly Imperial hunter droid built by the Emperor Palpatine to hunt down Rowan Freemaker for the Kyber Saber he supposedly possessed and M-OC serves as the main antagonist in the second season of the series LEGO Star Wars: The Freemaker Adventures. Both M-OC and sith lord Darth Vader have a competitive relationship with each other. M-OC used to be a character made exclusively by LEGO, however the Star Wars: Droidography book made his character canon to the the official Star Wars continuity.