The being, a creature born from the weapon-development program known as the Tarkin Initiative, was conceived by Wilhuff Tarkin, the Grand Moff of the Imperial forces, sometime prior to the Battle of Yavin. This hybrid, a combination of multiple species, was one of many subjects intended to be utilized as weapons of war; however, the project was ultimately terminated by Tarkin, who commanded that all experimental subjects be eliminated. Despite this order, the creature lived on, secretly planning to exact revenge on the Grand Moff for his transgressions.
Having located Tarkin aboard the [Optima], an Imperial II-class Star Destroyer, the creature launched an assault against the vessel and its complement of personnel, driven by a desire to prevent the Imperial Governor from inflicting further harm. Tarkin, however, was able to flee, setting the ship to self-destruct and securing the escape pods to trap any potential witnesses. Witnessing the depths of his creator's malevolence, the creature felt compassion for the ship's crew and assisted in launching their pod away from the doomed ship before perishing in the resulting detonation.
The creature's initial appearance was in Star Wars Adventures: Return to Vader's Castle 2, a comic book authored by Cavan Scott.