One of the three dragons that runs the lair, and Orion's wife. Black Diamond is tasked with handling complaints and other feedback, and handles the diplomacy with other lairs. Even beyond the Scarred Wasteland. Every merchant and trading caravan answers to her, and she was the one who set up the system of messengers once contact with other clans really picked up.
She also monitors meetings with the representatives of the 11 elements, and makes sure that the political system of the lair works well in practice. The representatives form plans for the lair, and the Three are only allowed to aprove or reject them. Black Diamond makes sure this happens according to plan, and checks plans for errors or discrepancies beforehand.