Heiji Uzumasa Ookawa

Age: Unknown, but definitely over 70
Birthplace: Mount Katsuragi, Nara
Job: Ninjutsu Academy Headmaster
Committee: Class President Committee advisor

Ninjutsu Academy's eccentric, willful and self-indulgent Headmaster, known as a genius ninja in his youth. He runs the school mostly by indulging in whatever sudden whims and ideas he has, often to the exasperation of the students and the rest of the staff. He's very fond of the spotlight and often hands out bromides or figures of himself as prices to the students in various events.

Through the years he's gathered a wast network of both friends and acquaintances as well as enemies, and he's often the target of various assassination plots. In the anime he has a granddaughter named Shige who's a student in the kunoichi class, and the ninja dog Hemu Hemu as his constant companion.