Mantyn Offastup was the last War Judge of the Exoi Kritocracy, holding his office until 155 ABY. He met Rin Sakaros's party as they landed on Toriafas and escorted them to their accomodations before Rin met with the Governing Judges.
After the death of God-King Chohwelk VII, when the Governing Judges voted to dissolve the Kritocracy and pledge their worlds to the Golden Empire, Offastup worked with Prime Legate Sorrik to transition the Kritocracy's military to the Armada's control. Through Sorrik and Offastup often butted heads, Sorrik offered the Exoi a spot in the Royal Navy.