Ministry of Penance

Are you referring to Minister of Penance, a San 'Shyuum Legate of the Covenant who served in the Second Battle of Harvest?

The Ministry of Penance is part of the Covenant's Council .

Meaning

Penance is repentance of sins as well as the proper name of the Catholic and Orthodox Christian Sacrament of Penance and Reconciliation/Confession. The word penance derives from Old French and Latin poenitentia, both of which derive from the same root meaning repentance, the desire to be forgiven.