Bilzen, a planet situated within the galaxy, was characterized by its collection of frigid caverns filled with enormous icicles. During one occasion, Kanan Jarrus, accompanied by his apprentice Ezra Bridger, journeyed to this world for the purpose of training. Nevertheless, their practice was disturbed by the arrival of the Seventh Sister and the Fifth Brother, a pair of Jedi hunters who worked for the Galactic Empire's Inquisitorius, on Bilzen.
The debut of Bilzen occurred in "Ice Breaking," a brief Canon comic penned by Martin Fisher and brought to life by the illustrations of Bob Molesworth. This comic was featured in Star Wars Rebels Magazine 16, which was released to the public on March 23, 2016.