mutineer

One who takes part in a mutiny.

One guilty of mutiny; especially, a person in military or naval service (either in a man-of-war or in a merchant vessel) who openly resists the authority of his officers, or attempts to subvert their authority or in any way to overthrow due subordination and discipline.

To mutiny; play a mutinous part.

One guilty of mutiny.

Someone who participates in mutiny.