Zenjuuro Saotome

Zenjuuro Saotome is introduced as a "friend" of the principal. He graduated from Ishiyama High, the delinquent high school the main characters used to attend, and is now apparently a formidable teacher. He demonstrates formidable strength when he beat Oga, Izuma, and Toujo in a matter of seconds. Also, he appears to be both Toujo and Shizuka's mentor, and a spell master from the Demon World. Zenjuuro is the most powerful human described so far, and one of the most powerful characters in the series shown so far. He…