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Zo Resken, the Prophet of Clarity, was a San'Shyuum who joined with Arbiter Thel 'Vadam and the Covenant Separatists following the end of the Human-Covenant war.
Zo Resken was born on High Charity. He once worked as the Secondary Administrator to the Prophet of Truth and wrote a document titled Notes on the History of the Covenant.
During the Great Schism, he honored his relationship with the Sangheili and joined the Covenant Separatists alongside Arbiter Thel 'Vadam. Following the end of the Human-Covenant war, he left the Covenant Separatists and settled on the Ussan colony known as the Refuge.