Йокошіма Наруко

A teacher at Ōsai Academy, who happens to be the advisor of the student council. She, like Aria and Shino, often has perverted thoughts on her mind, and apparently has a thing for younger guys (and the male students of the school are often targeted by her). She is often portrayed as unreliable and useless, from an educator's point of view. (Source: Wikipediea)