Sakurai Ryoko

Japanese name:

桜井 良子

Ryoko Sakurai is the director of the Holy Forest Academy. She is a caring woman who believes that Eikichi Onizuka and his "methods" will work positively for the school, contrary to the beliefs of the faculty. The only time in the series that she did not approve of his behavior is when Onizuka endangered her grandson, Mayu Wakui, but she later admits this is due to his manipulative nature. She is also Daimon Misuzu's former teacher.
The Sakurai portrayed in the live-action is not as initially confident in Onizuka's abilities, sometimes blocking the door to her office in fear, when she hears what Onizuka has done, by eavesdropping on Vice-Principal Hiroshi Uchiyamada's conversations.

Wikipedia