4D-M1N, nicknamed 4D, was a feminine command bridge droid who assisted Imanuel Doza, the captain of the Colossus platform on the planet Castilon. While often residing in Doza Tower, she occasionally left to perform tasks for the station's captain. The First Order's interest in the station ultimately resulted in her destruction, when she was shot down by Commander Pyre while she attempted to defend Captain Doza from being placed under arrest. After the Colossus escaped from a First Order attack into hyperspace, 4D-M1N was repaired.

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