Biology and appearanceEdit
In comparison to their Echani conspecifics the Thyrsians shared only few physical features, being Near-Humans nevertheless. Their look equated the exact opposite: the skin was dark instead of chalk-pale, the hair dark alike and not silvery. It was believed that the Echani were a result of Arkanian experimentation with the Human genome, a theory applied also to the Thyrsians as a subspecies.
Society and cultureEdit
The Thyrsians were in many regards a diametrical contrast to other Echani. Men dominated whereas the society of the remaining Echani showed matriarchal traits. The warriors of Thyrsus relied neither on light armor nor combat without weapons, but preferred being heavily armored and blades in their hands. In spiritual terms, they focused on the sun rather than the moon. Their military units wore the stylised red suns of Thyrsus as emblems for example. The Thyrsians kept a traditional element of Echani arts in at least one way: the weird skill to read the body language of counterparts and to forecast their next move.
More than one hundred years before the Imperial Period, Thyrsians developed a fixation on matters of the Force, especially the prophecy of a galaxy's savior known as "the son of suns". The Order of the Sith Lords, keeping their existence a secret after the Battle of Ruusan, exploited the Thyrsian faith that the Sith were the subjects of this presage and encouraged Sun Guards to follow Sith interpretations of Jedi belief, so converting them into Sith cultists who found their ultimate fate under Darth Sidious.
During the Bengali Uprising, the Echani on the sun-baked planet of Thyrsus, even called the Thyrsians, revolted against the female council that ruled the Six Sisters, a confederation of six worlds dominated by the Echani, seceding their world from the others. In this conflict a Thyrsian special-missions division evolved into the Sun Guard.
As the centuries passed, the Sun Guards largely abandoned Thyrsus and became a group of seminomadic mercenaries similar in organization to the rival Mandalorians, and eventually a cult under the influence of the Order of the Sith Lords. During and after its service for Darth Plagueis his pupil Darth Sidious used the Sun Guards as sentries, mercenaries and assassins, later ordering Count Dooku to task his executor Asajj Ventress with the elimination of the cult, whereupon the few surviving devotees, the most fanatical ones, were considered for the Red Guard, cloning templates, and the Emperor's Royal Guard. Force-sensitive members became candidates for the Imperial Shadow Guard.
Not all Sun Guards followed that way. In a sector internal struggle between Emberlene, a member of the Confederacy of Independent Systems, and its neighbors, rogue factions of the Sun Guard were hired by the latter ones to led a mercenary army against the aggressors, resulting in the Destruction of Emberlene.