A Master of the Guard refers to a male in a Court who is the leader of the Court's Guards and is directly responsible for the Queen's security. He is also refered as one of the three sides of a Queen's Triangle, the other two sides being Consort and Steward.
A Master of the Guard is directly responsible for the Queen's safety, with duties such as organizing armed escorts when a Queen needs to do official tours. He is also the direct superior to a Court's Guards.
When Jaenelle Angelline set up the Dark Court, she appointed Andulvar Yaslana as her Master of the Guard. Andulvar served in this position till the decomposition of the Court and untill his final death.