Alexsandr Kallus was an agent for the Imperial Security Bureau before and during the Galactic Civil War. Agent Kallus, whose operating number was ISB-021, was one of the primary antagonists of the Ghost crew, consisting of Ezra Bridger, Kanan Jarrus, Hera Syndulla, Sabine Wren, Garazeb Orrelios, and the astromech droid Chopper, in the animated series Star Wars Rebels.
Before his role in Rebels, Kallus had graduated from the Royal Imperial Academy on Coruscant as the first of his class, making him a skilled and respected Imperial officer.
Kallus believed in the Empire’s efforts to bring order to the galaxy and fought against rebel insurgencies that threatened the Empire’s rule. Kallus was instrumental in the genocide of the Lasat people on the planet Lasan.
After a failed attempt to trap the Ghost crew over Geonosis, Kallus and Zeb Orrelios, who was a Lasat, were cut off from the resulting battle in an escape pod and stranded on the frozen moon Bahryn together. Suffering a broken leg and on the verge of freezing to death, Kallus was forced to work with Zeb in order for the both of them to survive. Through this unlikely partnership, Kallus learned about the loyalty and honor of the Lasat people and the camaraderie of the rebels. Kallus and Zeb were able to develop a mutual respect for one another as soldiers.
After Zeb was rescued, Kallus returned to his post with the Empire, but he was clearly shaken by the experience on Bahryn.
Who is Fulcrum in Star Wars Rebels?
The rebels and the Ghost crew began to receive inside Imperial information from a source who went by the codename Fulcrum. This was secretly Kallus, whose previous loyalty to the Empire was no longer an option after he learned for himself what the rebels were truly fighting for.
Kallus was able to act as a spy in his role with the Empire for a time until Grand Admiral Thrawn discovered Kallus’ true allegiance. He was imprisoned by the Empire but escaped during the attack on the rebel base on Attolon and was taken by the Ghost crew to the rebel base on Yavin 4.
Kallus helped to liberate Lothal from Imperial occupation and served the Rebellion as a soldier and tactician until the fall of the Empire. After the Empire’s end, Zeb took Kallus to Lira San, the ancient home of the Lasat people, to show him that though he had tried to eliminate the Lasat people, the Lasat species survived after all. The Lasat welcomed him as one of their own, and this served as a powerful moment of redemption for Kallus.