MV-33 security droids were a model of security droid constructed by the Tagge Corporation. By the time between 3 ABY and 4 ABY, they had yet to be quality-tested and were stationed aboard the Casus Belli. After the ship's droids were infected by the Scourge, two MV-33 security droids attempted to attack Lapin Tagge—the secretary of the company's leader, Lady Domina Tagge—as well as the rogue archaeologist Doctor Chelli Lona Aphra and the assassin Just Lucky until they were destroyed by Domina.