Nariyuki is shown to be a hardworking student that even though he was not good in studying in the past, following his father's encouragement to become someone who can do everything, through hard work he was able to achieve a steady grade of 80% on all subjects. Nariyuki is also a caring person, as his ultimate goal for getting a scholarship was to give his family who is poor a better life. Not only that, but he is also caring for his friends whenever they're in any trouble, always helping them out without a single complaint.

He can also be dull and dense as he's oblivious to the romantic feelings the girls have for him throughout the series, especially Rizu  Ogata's and Uruka Takemoto's.