Yukari Tanizaki, also known as Yukari-sensei, is the girls' English and homeroom teacher (class 3), but a teacher with very unconventional methods and a rather close relationship with the class. Her students are casual enough to call her by her first name: Yukari-sensei, and some of them use the informal title Yukari-chan. Depending on her mood, she can be either a horrible tyrant or sweet. Yukari is impulsive and is also a notoriously bad driver, as evidenced by the horrid condition of her car, which the students have dubbed "the Yukari-mobile".