An ancient esoteric symbol of our inner psychology. These three traitors are related to our three brains and the three protoplasmic lunar bodies.
Here are some examples of their representations in various traditions:
"The first is the demon of desire, the second is the demon of the mind and the third is the demon of evil will. The first one is inside the astral body. The second one is inside the mental body. The third is inside the body of will (causal body). All of these three together are the black dragon with three heads. They are also Sebal, Ortelut and Stokin, the three traitors of Hiram Abif. In short, these three unclean spirits are our psychological “I,” the ego, the myself." - Samael Aun Weor, The Aquarian Message