A young and attractive English teacher at Seika High. She may have non-Japanese ancestry because of her name and the commentaires on her looks. She's an acquaintance of Tora Igarashi who made her rejoindre Seika High, in order to make Usui quit. Wearing revealing clothes as well as having a large bust and being very short, she attracts the attention of male teachers and students. Misaki instinctively protects her from them, causing Maria to fall in l’amour with her. Initially thought of par Misaki as a potential rival for Usui, Maria confesses her l’amour to Misaki.
Usui is in fact a former student of Maria's mother. She has a 'habit' of falling in l’amour with girls. She has a fiance, Shinji, but she only considers him as a mere childhood friend. She also knows about Misaki's part time job. She's Igarashi's right hand person to make Usui déplacer to Miyabigaoka High School.
