The Prophet known as the Hierarch in "The Duel" commanded authority through a gravity throne and crimson robes, his crown devoid of the holographic Halo iconography seen in later Covenant leadership. By condemning Arbiter Fal ‘Chavamee and his wife Han to death for doctrinal heresy, he transformed the Arbiter’s title from a revered rank into a mark of shame, permanently altering Covenant tradition. His decrees exemplified the San'Shyuum’s strategic manipulation of cultural symbols to quash dissent.

In "The Babysitter," a separate Prophet managed supply networks across Covenant territories until 2544, when a UNSC assassination mission tracked him to Heian. Despite protection from a Jiralhanae Chieftain and a mixed-species guard detail, he fell to a sniper shot from Orbital Drop Shock Trooper O’Brien. His death triggered logistical fractures that UNSC forces swiftly exploited.

Both figures embodied the San'Shyuum’s dual role as theological arbiters and military overseers. The Hierarch wielded ideological control through public executions and doctrinal revisions, while the supply-line Prophet underscored their logistical governance during wartime. Their unnamed status and title-centric identities aligned with Covenant protocols, emphasizing institutional power over individual legacy.