Ootsuki-sensei

The hotblooded head of class 51 of Doumori Elementary tsukisensei is another exorcist/teacher combination. However unlike Nb he believes that all phenomenon are a result of plasma not spiritual power. These beliefs lead to the two teachers consistently feuding over what is the true nature of the many problems that persist in and around the school while the students in both classes also face off due to the loyalties to their hometeachers beliefs. Using his own scientific knowhow and research he uses several devices and inventions that allow him to research and take out any of these threats. sort of similar to the scientific research and inventions done in Ghostbusters. Although Ootsukisensei appears a couple prominent times early on he merely fades into the background as the manga goes on. Source: Wikipedia