Nanami is a stern and aloof university professor, who takes his role of educating students very seriously. His stoicism and no-nonsense attitude give the impression that he is disinterested in the world, but those who look beyond his surface can see that he takes his role as a professor very seriously. Despite his dislike of engaging in small talk, he is patient and compassionate with his students as he explains complex mathematical concepts and provides examples to clarify any doubts.