Nikolai is sadistic and loves to speak in great theatrics. One of his main traits is his tendency to pose questions (oftentimes rhetorical threats) as "quizzes". He is also skilled in disguises, deceiving Tonan as his secretary. Whilst fighting Atsushi Nakajima, Nikolai depicts great joy in fighting and tormenting him, going as far as to capture Atsushi's leg in his coat and leaving it in a separate space on the floor.