A third-year student at Shuuetsu Academy. A genius who can make any power his own. An altruist, he is not proactive, but under Ibara's management, his true value is shown. He is a member of "Adam" and "Eden" and acts as their leader.

Quiet and somewhat "my pace", Nagisa feels he cannot convey his thoughts well to others without an intermediary. Because of this, he tends to move along with what Ibara tells him to do, thus creating a character of a dictator to use during lives. He has been described as being more similar in character to one of the "five oddballs" than a member of "fine" multiple times, which can make others wary of him due to how distant he feels from other humans. At his core, however, he does not wish to hurt others, and mainly wants to understand them.

(Source: Ensemble Stars! Wiki)