Was the 10th Generation Black Dragon Attack Squad Captain. He joined the Tokyo Manji Gang and became a member of the First Division. In an alternate timeline, he is the First Division Captain of the Second Generation Tokyo Manji Gang. As of the final time leap, he is a Seventh Division Member of Toman. When he finds people he trusts, he devotes himself to them. Very loyal and kinda hearted.

A kind but intimidating stranger you met

He was a former student of Tokyo Jujutsu High where he was an underclassman of Satoru Gojo and Suguru Geto. Nanami initially left Jujutsu High after graduating to become a salaryman, but returned four years later to continue working as a jujutsu sorcerer.