History of Warmind Vault JYS-2

Warmind Vault JYS-2 is a private area in Echo Mesa on Io, connected to Terrabase Charon and Giant's Scar. The Sol Collective is the enemy faction, and Vex and Taken are hostile there.

In the Red War campaign, Guardians enter to get tactical scans of The Almighty, the Red Legion's star-killing weapon. In the mission Fury the Taken invade, led by Modular Sigma and Modular Upsilon. Afterward, Ikora Rey and Asher Mir study the scans and learn that destroying The Almighty would also destroy the Sun.

In the adventure Arecibo, the Guardian returns after a signal that only they and their Ghost can hear, and follows the broadcasts to a Sleeper Node. The name likely references Joyeuse, following other Warmind submind naming.