The "Masked Breen" was the name given to the first Breen to visit Ferenginar, sometime between the mid 20th and mid 22nd centuries. He was given this name by the Ferengi whom he encountered due to the spacesuit helmet which he continuously wore. The Ferengi were unaware that no Breen ever removed their helmets in alien atmospheres. The short story "A Dry Day on Ferenginar" says that Ferengi warp technology was purchased from the Breen by DaiMon Greko, after he had left Ferenginar aboard a Ridorian merchant ship. It is unclear how these two stories might be reconciled.