Nengi Nakatsu (中津 念義, Nakatsu Nengi) is a senior classman of Hakoniwa Academy and one of the delinquents who originally made up both the Kendo Club and the 2% of the votes that Medaka Kurokami did not receive.
Nakatsu ignores the great majority of school rules, instead hanging out in the kendo hall with his friends. Like the rest of his gang, he smokes. After Medaka's intervention however, he seems to have reformed somewhat, and the passion for kendo he once had has been rekindled.
Nakatsu has a black eyes and brown hair. He foregoes the uniform of a student of Hakoniwa Academy, instead wearing a green shirt and dark pants, as well as a necklace. He wears a black eye patch over his left eye. He is also seen in his kendo uniform.
Student Council Executive Arc
Nakatsu is hanging out at the Kendo Hall when Medaka and Zenkichi Hitoyoshi arrive. At Mahibi Moji's order, he and the others surround the pair. He is amazed when Medaka manages to confiscate the cigarettes of everyone present before they can react. The next day, the group returns to the kendo hall in uniform, much to Zenkichi's surprise. After Medaka leaves to attend the Student Council Recruitment meeting, the Kendo Club is attacked by Habataki Hyūga, who defeats them all. To Hyūga's shock, Moji gets back up, proclaiming that even he was once passionate about kendo. Inspired, the other members rise back up as well. An enraged Hyūga attacks them, only to be stopped by Zenkichi. After being "converted" by Medaka, Hyūga takes over the Kendo Club and shares the hall with the other members, though he and Moji sometimes butt heads.
After Myouri Unzen blows up the Student Council office, Nakatsu and several other members of the Kendo Club hear the commotion, though they assume it is simply Medaka being up to her usual antics.
Unknown Shiranui Arc
Bouquet Toss To The Future Arc
Nakatsu is among the students who confront Medaka at the beginning of the 100 Flowers Run, holding flower number sixty-four. He and the others are all blown away by Medaka's Kurokami Final. All present wonder if Medaka thinks of their time together as good memories. Her message to Medaka is that she was able to laugh.