Nakano was a student from Suzuran and one of the participants of his year's Freshmen War.
He first appeared claiming he is the strongest of all the participants and telling Butcher to leave the leadership of the freshmen to him. However, he was promptly knocked out with a headbutt by Butcher.
It was revealed that Butcher did that because he wanted an even number of participants. By knocking him out, seventeen participants have been reduced to sixteen.