Also known as: 白井紗江
Character in Kodomo No Jikan, a stern teacher often at ends with enthusiastic, newcomer Aoki Daisuke, as well as peers Houin Kyouko and Oyajima. Often clothed as one may expect of an office lady, she later sports a shorter, looser haircut and opens up more to the other teachers and some students (namely Kagami Kuro).