Sawatari

Sawatari is the head teacher of Shirokin Academy, and he is also the school's vice principal.

Manga
Unlike his anime counterpart, he's rarely shown much. But he's not interested in getting the school shut down. He just honestly has often little faith in the students, due to their wild behavior.

Anime
Contrary to his original personality, Sawatari in the anime is very much set on having Shirokin Academy being shut down. He is much like a school traitor and talks down about his students, and he does not look for any good in the students. In the anime, Sawatari is only looking out for his own personal benefits and most often works with Shirokawa Ganichiro to get the academy shut down. Towards the end of the anime, Sawatari attempts to take camera shots on Kumiko and her students to take down the gangster members led by Nekomata in order to expose Kumiko's yakuza family lifestyle as a scandal to the school, it was stopped by both Kyotaro Oshima and Kumiko's old dog, Fuji Kuroda and threatens him that the Oedo clan is now backing up the Shirokin Academy due to Kumiko's caring for her students, causing him to get horribly scared and leave the premises.

Live-Action
Unlike both of his appearances in the manga and anime, Sawatari is unpleased to see Kumiko at first and later always giving advices towards her work as a homeroom teacher even throughout the seasons when he always move from every other schools and being surprised that Kumiko was there to work the same.