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DMA is theoretically a member of the AH.com Ship's security team, but in practice fills a variety of roles. He briefly left the ship to coincide with a period when the real life DMA was ill, but soon returned. His character is also a former first officer of the Ctt.net Ship.
In Luaky Commer, DMA fills the Hagrid role, and acts in an extremely stereotypical-Australian fashion.