Borough participates in Killy's Uoodo operation, taking the guise of a holy man and becoming the mentor of the Perfect Soldier, whom he calls "Proto-One". When Chirico is discovered in Uoodo, borough aids the effort to eliminate him, ultimately pitting Proto-One against him in battle. After the destruction of Uoodo by the Melkian army, Borough casts his lot with another of Killy's allies, the Prince of Kummen, and continues to hound Chirico until their final confrontation.