"Tuskens on your right private!!!" ST-4012 during a conflict with the Tusken Raiders
ST-4012, also known as Sierra Madria is a human female stormtrooper captain of the feared 145th incinerator battalion, of the Trans-Galatiac Empire. Instead of other Trans-Galatiac imperial stormtroopers, she relied on Phase III stormtrooper armor, which is a combination of Phase I stormtrooper and phase II or First order armor.
Sierra Madria, is a young idealist, who dislikes the New Republic's corruption, and the First Order over aggressiveness , and the Resistance slowness to act. The Trans-Galatiac Empire was actually providing order, and safety to its citizens.
Sierra Madria showed a sort of tough love to her men, and like her fellow incinerator troopers she was a clone of a unnamed human template with genetic modification. She fought at some of the toughest battles for the Trans-Galatiac Empire such as the siege of Median IV and later was prepared to invade First Order space. Before so she was part of the Occupation of Median IV until the New Republic and Trans-Galatiac Empire arranged for the planet to regain its Independence.