Thyssian

An adult Thyssian female (right) and Thyssian males (centre and left)

The Thyssians (Thyssian: Thyssāni) are a tall, blue-skinned humanoid species from the planet Thyss in the Galactic Core. A terrestrial species, Thyssians are characterized by their erect posture and bipedal locomotion, traits shared by many, though not all, sentient species in the galaxy. Despite developing on Thyss, most Thyssian historians consider Rholosh to be the homeworld of the 'True Thyssians' (as-Şahi aj-Thyssāni).

The origins of the Thyssians are difficult to ascertain, owing partly to the moratorium on pre-Rholoshi historical research by the United Planets, and the destruction of a great deal of historical data by the nuclear war which devastated Thyss. The Thyssians survived, though their civilisation largely collapsed and their numbers began to dwindle due to high mortality rates and low fertility. Due to a religious and political schism initiated by Rholosh a minority of Thyssians migrated from Thyss and settled upon the planet Rholosh, over time becoming the majority of their species.

In the modern day the Thyssians are largely found in the United Planets, through which they play a major role in galactic politics as a founding species of the Interstellar Assembly and associated organisations. Along with the Drudari, Xyn, and Chirrin they are considered an Elder Race. Despite the equality provided for in the Constitution of the United Planets, the Thyssians are considered to be the preeminent race within the union. The galactic Thyssian population was estimated to be near 80.2 billion in 84 PA