A Takaran scientist who faked his own death and killed Reyga in order to steal the metaphasic shield.
Jo'Bril is a Takaran scientist who volunteers to pilot the shuttle testing Reyga's metaphasic shield, since the other scientists do not trust a Ferengi to fly it and want an independent pilot.
In Suspicions, Jo'Bril appears to die during the test flight into a star, and Reyga is soon murdered. Dr. Crusher eventually discovers that Jo'Bril is alive and planning to steal the shield technology for use as a weapon. She confronts him aboard the shuttle and kills him in self-defense.