Hagi has a rather calm, solitary, stoic and quiet personality, rarely showing his feeling or talking. When he does, he only says a few sentences and speaks rather monotonously. He actually gave up showing his emotions after being shocked and disappointed during the Vietnam incident, coming to believe that as user's chevalier, his duties are to obey her orders and look after her well-being, keeping his deep feelings for her to himself. He even goes so far as to avoid ever using his full power.