Charon

Charon were a sentient species with both humanoid and arachnid features. They had four arms, two of which were extremely powerful, and four legs, which made them very stable on their feet and were known for their violent, emotionless nature. Originally from realspace, the Charon were essentially a subspecies of the Charr Ontee of Kathol, who came from ships which were "flipped" into otherspace to a cold, bleak planet in a pocket dimension made up of black holes beyond the known confines of the galaxy.

The Charon were confined to otherspace, where most followed a cult which held the existence of all life, even their own kind, to be an abomination. Their contact beyond otherspace was limited, but it was enough to make them objects of horror.

Shortly after the destruction of the second Death Star in 4 ABY, a splinter group of Charon devoted to maintaining peace and setting up new communities successfully constructed the species' first hyperdrive and departed otherspace, with many Charon taking up positions as bioscientists, developing bio-organic technology similar to that of the Yuuzhan Vong.

Text and facts from the “Charon/Legends” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.