Umbaran

The Umbarans were a race of outwardly humanoids native to the planet Umbara, and was known to have existed at the formation of the Old Republic. Umbarans were characterized by their pale, bluish skin and white-pigmented eyes. Umbarans were capable of seeing into the ultraviolet spectra of light, but had little vision in the normal, visible spectrum. In fact, an Umbaran could be momentarily blinded by a bright flash of normal light.

It had been said that Umbarans had the ability to subtly influence and control other beings, and it was known that many Umbarans used their strange abilities in identifying hidden Jedi during Emperor Palpatine's Jedi Purge. Because a great many Umbarans used their influence to secure positions of power within the government of Emperor Palpatine, as a people they feared that some form of retaliation might occur when Palpatine was killed at the Battle of Endor. This led the Umbarans to flee deeper into the Ghost Nebula, although they maintained an invisible information network to monitor the activities of the New Republic.

As a people, the Umbarans existed in a detailed caste system of nearly 100 distinct levels. Of these levels, only those Umbarans who were in the top ten were allowed to leave their homeworld and visit thje galaxy at large. However, movement between caste levels was possible for all Umbarans, and most individuals spent a large portion of their lives planning how to move up to the next level. Those individual Umbarans who failed in an attempt to move upward, especially those who arranged for assassinations or other illegal activities, were usually sentenced to life in prison or death, depending on the caste level of the individual they tried to eliminate. This penalty was often made more severe by placing the individual's entire family under the same penalty, in an effort to prevent unnecessary deaths. Many Umbarans believed that the risks associated with moving up were far outweighed by the potential rewards, thereby perpetuating the practice.