Red Four was the callsign of the fourth member of Red Squadron.
Sometime around 1 BBY, Micha served as Red Four during a battle, in which she crashed her X-wing into Darth Vader, sacrificing herself in an attempt to kill him. The other rebels assumed Vader was dead, but they learned quickly that the Sith Lord had survived when he emerged from the wreckage and addressed them directly.
John D. Branon served as Red Four during the Battle of Yavin and was killed in action.
Sometime after the Battle of Yavin, the twi'lek pilot Bela Elar served as Red Four and participated in a battle in the Kiax Nebula.
Lieutenant Bastian served as Red Four during the Battle of Starkiller Base.
- Star Wars: The Rebel Files