Corrin, a female Human Sith acolyte serving the Sith Empire, was among the youthful apprentices selected by Darth Zash. This occurred while Kallig, her official apprentice, scoured the galaxy in pursuit of archaic relics during the Cold War and the initial stages of the Galactic War.
Following Zash's demise, Corrin swore loyalty to Kallig, recognizing them as her new superior. Subsequently, Corrin and Kaal played a crucial role in rescuing Kallig from elimination after Darth Thanaton almost succeeded in assassinating their new master. They subsequently went back to Kallig's starship to strategize their subsequent action, fully aware that Thanaton would put them to death for their insubordination. Kallig's most promising path to triumph involved binding additional Force ghosts utilizing the Force walk technique, as the two already under Kallig's control proved insufficient to overwhelm Thanaton. Kallig consented to investigate a clue located on Taris, while Corrin and Kaal pledged to vigilantly monitor Thanaton's movements.
After their master's success on Taris, the pair of apprentices got in touch with Kallig, disclosing that they had pilfered the key to Thanaton's secluded meditation chamber, which resulted in the Dark Lord seeking vengeance. Kallig made an attempt to meet them on Quesh, but both Corrin and Kaal were killed by Lord Cineratus, one of Thanaton's underlings. Kallig retaliated for their deaths by killing Cineratus, even after Cineratus pleaded for his life, claiming he was merely following Thanaton's orders.