Nagi is actually a who dresses and acts like a boy to meet her grandfather’s expectations as the heir to the Ichinose clan.

A refined male cat belonging to the Ichinose clan who wears a bell and acts as a guardian for Nagi. The Outcome

The episode begins with Junpei finding what he thinks is a pink love letter in his shoe locker. To his disappointment, it is actually a formal challenge to a duel from Nagi Ichinose , the athletic and intimidating captain of the track team.

Despite her "tough guy" persona, she is an "appreciator of beauty" and has a soft spot for cute girls like Kaede.