Krefak (d. 1942) was a missile battery officer in the Race's Conquest Fleet during the Race Invasion of Tosev 3. After setting up a position in the Soviet Union, Krefak's unit unsuccessfully tried to shoot down a shell launched by the German rail gun Dora. The shell destroyed The 67th Emperor Sohrheb. A second shell also proved impervious to Krefak's missiles. That shell hit the nearby 56th Emperor Jossano, which exploded, killing Krefak and his unit.