Saotome, Zenjuuro
Summary
Zenjuuro Saotome is presented as a close associate of the school principal and a graduate of Ishiyama High, the notorious delinquent academy attended by the main cast. Now established as a highly capable educator, he proves his formidable prowess by swiftly defeating Oga, Izuma, and Toujo within seconds. Serving as a mentor to both Toujo and Shizuka, he is also a spell master hailing from the Demon World. Considered the most powerful human encountered thus far and among the strongest figures in the series, Zenjuuro possesses superhuman strength, speed, and agility. He can easily defeat uncontracted demons, including Hilda, and overcomes Toujo, Oga, and Izuma with minimal effort. His power is so intimidating that Behemoth explicitly states a preference for avoiding a confrontation with him. Zenjuuro seems to hold secret knowledge from the demon world unknown even to Hilda. His command over his demonic abilities surpasses that of Oga, allowing for precise energy management, which is evident in his meticulous control over the size and expansion of his tattoo. Recently, he has offered to instruct Toujo in demon combat. Acting on the headmaster’s directives, he has been appointed as the homeroom teacher for the Ishiyama students.
