The leader of KEEL.
Leader of a team whose members have dragon skeleton marks on their backs. Rumors of their borderline criminal activity never cease.
He gets pleasure out of using fear and violence to control people.

Childhood friend of Sakura’s classmate, Masaki Anzai.
Busted by Anzai while stealing purses outside of town, it is revealed that Nagato is now a part of KEEL.
"Nagato was kind and gentle, but he was strong." What could have happened to him…