A Team Prime was the leader of a squad of Mistryl Shadow Guard warrior-women. In 0 BBY, for example, Manda D'ulin was the Team Prime of a group of six warriors, capable of operating as commandos or infiltrators, and also able to perform low-level space missions with their two heavy fighters, the Skyclaw and Mirage.
Another warrior was the Team Prime of a group of warriors and slicers at the Mistryl safe house on Naboo in 1 ABY.