Chieko Sannomiya is the eponymous principal of the Seito Sannomiya Private School. She was appointed office a decade prior to the story and carries herself in a conceited, yet formal, aristocratic manner. As a radical misandric, Sannomiya heavily supports feminism  and irrationally views males as barbaric. At the conclusion of the series it is revealed that an incident between a man (hinted by Lulu) and her lead to her sexist ideology.    (Source: Wikipedia)

Amawa Hibiki is a young man just out of college, with an education to be an athletics teacher. He's been having a hard time finding a job since he graduated, so all his money has gone towards living expenses. When his landlady demands his first payment to live in her living establishment upfront, he heads to the local middle school to get hired as a teacher. However, the principal refuses to hire him without hesitation. She will not hire men as teachers and makes it clear that she hates all men, saying they put no love into their passions and work. Amawa does not give up and with the help of his landlady, he crossdresses as a woman without a second thought, and gets hired, so he can earn money and also prove the principal wrong. Now, he has to keep his real gender a secret, and avoid strange situations, including the affections of his students (from both genders).
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(Source: Anime News Network)

Cast in:  Strawberry Eggs (TV) as Principal Chieko Sannomiya  Transformers: Armada (TV) as Young Woman (ep 30)

Hibiki Amawa is an enthusiastic young man whose dream career is to be a professional teacher, having graduated from college with a certificate in athletics. When he is unable to pay his landlady, Lulu Sanjo, the monthly rent for his apartment, he rushes off to the nearby (fictional) Seito Sannomiya Private School to apply for a position that is open, but is summarily denied employment because of his gender. Offended, and more determined than ever to have his way, Hibiki vows to demonstrate the merits of his educational philosophy to his detractors, and with offered help from Lulu, agrees to disguise himself by cross-dressing in order to deceive the school's female-only administration. With assistance from some gadgets Lulu engineered for this purpose, he disguises himself very convincingly. Following an initial demonstration of his merits as an educator, he is hired.
Unfortunately for Hibiki, however, life as a gym teacher at this school does not go completely smoothly. With interpersonal conflicts among students causing fights and occasional mild missteps endangering his disguise, Hibiki must not only mediate his class, but also keep up appearances and navigate life in disguise.
(Source: Wikipedia)