Headmaster

School Youkai of the First Rank. The Headmaster.
It is said that he slips out a photo of a principal from ages past in the principal's office and wanders around the campus grounds.
It is said that he spirits away students that he meets and erases any trace of their existence from reality itself. He shows a calm disposition but he hides a terryfying brutality. Now he's older, but once he was a youkai who could devour entire schools.
It seems he has a terryfying wife as well. So it seems he spends his time at school to avoid going home.