This article pertains to Xenogears: the sub-database of the Xenosaga Wiki.

The Ethos is a monastic sect dedicated to the collection and preservation of knowledge and technology. They exist in all countries, are the main source of maintenance for the world's Gears, and are a strong influence in each government. The Ethos are responsible for organizing the Kislev Battling competitions, and for regular extermination of the Wels monsters. A priest in the Ethos is known as an "Etone." Unfortunately, the Ethos were merely a front for Solaris; like Gebler, Ethos' primarily function was to control the people via faith and manipulate the events to ensure that -Project Noah- and other Solaris operations were running smoothly. Billy Lee Black was once an "Etone" in the Ethos Society, until he learned the shocking truth of the organization from the manipulative and ruthless Bishop Stone, and the underground computer banks in the Ethos Headquarters. The Ethos is very similar to the U-TIC organization in Xenosaga; both are fronts for larger, more political powers.