Mount Octan, a volcanic mountain situated on the jungle-moon of Nallastia, served as the location of the Skull Queen's fortress. This queen, named Quenelle, held dominion not only as the Margravine but also as the political leader of the Fondorian satellite.
This mountain, its peak described as piercing the sky, gained its name from Margrave Octan, the founder of the Nallastians. He was a descendant of the Royal Octans, a powerful family within the Darpa sector whose wealth and position could be traced back to the era of the Old Republic, specifically before 4000 BBY. Legend says that the Margrave's powerful gems, known as the Lost Stars of Nallastia, were hidden deep inside Mount Octan, within the Cavern of Screaming Skulls.
In the grassy foothills of Mount Octan, a young Jedi Padawan named Anakin Skywalker, at the age of 18, made an emergency landing in a CloakShape fighter. He had "borrowed" the ship from Senator Rodd during a mission to Fondor in 23 BBY. These foothills were home to dangerous creatures like the poisonous venrap snake and the wild reptillian [grillik]. It was here that Skywalker encountered and befriended Klay Firewell, an 11-year-old boy from Corulag whose zoologist parents had been captured by Nallastian princess Calvaria for trespassing and held imprisoned within an energy field. Skywalker negotiated for their freedom and assisted in the quest for the ancient power gems to secure their release.