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Duran was a man of average height and build. He had short, dark hair, and a thin beard, and could be seen wearing a light-colored shirt and dark pants under his anti-personnel vertical maneuvering equipment.
When the Anti-Personnel Control Squad is tasked with killing Levi Ackerman and his squad, Duran is stationed on the roof of the bar where Captain Kenny Ackerman has cornered Levi. However, Levi is able to incapacitate Kenny, and while exiting the bar, kills Duran and uses his body to shield himself from Duran's teammates.