Sergeant Mokem was a Gungan soldier of the male persuasion who resided on Naboo.
In the year 32 BBY, during the Invasion of Naboo, the passengers who had been displaced from the Crescent escaped from Theed and attempted to find refuge within the borders of the Lianorm Swamp that was nearby. The refugees were stopped by a Gungan patrol led by Mokem, who then escorted them to the swamp's perimeter and would not permit them to proceed any further into it.
The Gungan family name "Mokem" translates to, "greatful guest."