Truman has often been jokingly rumored to be a modified robotic aide that Captain Deckard keeps on staff. His demeanor is often stiff and formal, though he does relax more when he and the captain are alone, and his more humorous side comes through. He and Deckard will occasionally rib one another, but he is unwaveringly loyal to her and to the Bucephalus. He is calm under pressure and follows orders to the letter, though sometimes with a little cheek.