Thessia is the homeworld of the Asari. The planet is dotted by loose confederacies of great republican cities - including Serrice and Armali - that function in an overall democracy connected by the asari internet. Many of these cities are home to craft guilds legendary for the quality of their bio-amps.
In Mass Effect: Revelation, David Anderson drowned his sorrows at Chora's Den with a liquor from Thessia called 'elasa'. Edan Had'dah was also fond of dressing in the latest Thessian fashions.
- "Thessia" is adapted from Thessaly. Roman writers such as Ovid and Seneca held that the "witches" of Thessaly had the power to draw down the moon.