The Lesser Prophets are the San Shyuum represenatives of the Covenant Empire's High Council. While the Hierarchs are the most prominent of San Shyuum governors, councilors or lesser prophets are extremly important in the Covenant society and share power with the Sangheili councilors. They also appear to be slightly higher than Elite councilors, at least in military proceedings when the Prophet of Stewardship ordered the execution of Sangheili Councilor Soha Rolamee for failure to contain the Flood.
During the Great Schism, the Lesser Prophets were disposed by the Prophet of Truth as part of his plan to become the sole ruler of the Covenant Empire by getting rid of the other San Shyuum such as Prophet of Mercy who had abandoned High Charity only to be killed by the Flood, as ordered by Truth himself.