Thot Graal was a rogue in the Breen Confederacy. As a powerful military leader, Graal would often go undercover as a mercenary to conduct his missions.
In 2372, the Dominion hired Graal and his 'pirates' to attack targets in the Bajoran system. One of the locations he attacked was the Bajoran colony of Prophet's Haven. (LUG RPG: The Dominion War Sourcebook: The Fires of Armageddon)