The Assassin sect was a group within the Yuuzhan Vong empire.
The assassins were a group within the Yuuzhan Vong priest caste who were Shaped to be agile and deadly with the intention of attacking their enemies as well as incapacitating them quickly. This meant that they were not as powerful as a member of the warrior caste.
A member of a specialist assassin sect was assigned as the bodyguard to Priest Harrar during the mission to capture Jaina Solo when she fled to the Hapes Cluster. He attended to create a unique specialist bodyguard unit to serve him when he claimed a world for himself during the Yuuzhan Vong War.