Hibiki Amawa
The central protagonist of the series, Hibiki Amawa is a fairly typical college graduate whose goal is to become a professional school teacher. His life takes an unexpected turn in the process when, in order to pay off his apartment rent, he is forced to cross-dress in order to gain employment at the misandrist Seito Sannomiya Private School. His situation only gets more complicated when the school board grows suspicious of him, students take to fighting with each other, and one of the girls of his class develops romantic feelings for him. In spite of all the difficulties he faces on the job, however, Hibiki proves to be a very competent and focused young man who proves that, as a man or a woman, he is quite proficient at teaching
physical fitness and at social
counseling.
Fuko Kuzuha 
Clumsy but selfless, Fuko Kuzuha is a student at the Seito Sannomiya Private School. Despite being accident prone, mild-mannered, and easily flustered, Fuko is a very strong-willed girl. Much to her personal anxiety, she starts admiring Hibiki's (still very masculine) personality in
drag, and this admiration develops into a powerful romantic attraction, bringing her considerable
gender confusion and shame. Her mother died when she was six years old and her widower father is a traveling businessman. Fuko resides at the school
dormitories.
Akira Fukae
Quiet and composed, Akira Fukae is one of the primary male students on campus. Even though he usually tends to be level-headed, Akira is not afraid to speak his mind or take a stand for what he believes he is fair and just. His father is a
private investigator. He occasionally teases Fuko Kuzuha in a rude and hostile way, but despite this, he harbors a strong
crush on her.
Fujio Himejima
An aggressive
tomboy, Fujio Himejima is a student at the school. She wears her hair in two loose pigtails, tied by her signature green bows. She has a
black belt in
Aikido and develops a crush on fellow student Akira Fukae, who unfortunately, does not reciprocate. Fujio resides in the dormitories.
Kyosuke Aoki
Kyosuki Aoki is another one of the few male students at the school, arguably the most energetic and is also the tallest; comparable to Miho Umeda to the girls. He is takes the biggest interest in Hibiki's
drag and frequently proclaims it to her and the others. Is good friends with Akira Fuka
Shiro Naruo
Another of the few male students. He is a gentle and quiet boy, who in episode eight is unjustly accused of stealing Reiko Mukogawa's salary when he is asked by Hibiki to visit the teacher's lounge and retrieve his grade book.
Seiko Kasuganomichi
Seiko Kasuganomichi is a fairly quiet student. Her family is wealthy and she is often seen as being sheltered. She is well known for getting uncomfortable, in some cases fainting, at the sight of naked men; photographic or physical. Fujio resides in the dormitories. She is a foil to Miho Umeda.
Shoichi Iwaya 
Another enrolled male student at the school and a close friend of Kyosuke Aoki. He is the most
lecherous of the group
Reiko Mukogawa
Vice-principal of the Seito Sannomiya Private School. She works closely with Chieko Sannomiya, and like her, is a stern man-hater, resulting from a failed marriage. Mukogawa grows suspicious of Hibiki early into his career and tries debunking his identity several times. She has one child who is never mentioned to either the staff or students of the institution.
Miho Umeda 
Miho Umeda is a student at the school and is Fujio's closest friend. Her maturity is considerably more developed than her friends and this at times makes her behave in an arrogant manner; especially when it comes to her past and current experiences with boys. As a result, the other girls tend to look up to her and this prompts her to act like a
role model for them. Miho resides in the dormitories. She is a
foil to Seiko Kasuganomichi.
Chieko Sannomiya
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.
Lulu Sanjo
Lulu Sanjo, more often referred to as "Baa-chan" ("Granny") by her tenants, is the tough-as-nails, pistol-packing landlady of the Gochiso apartments, which double as a school supply store that she also owns. Impressed by Hibiki's strong determination, she offers to help him in his mission, helping him disguise himself as a woman and maintain the disguise throughout his time on campus. In the final episode, it is heavily implied that Lulu is a crossdresser as well.
Mori Koji
Mori Koji is a
salaryman who is a tenant at the Gochiso apartments; room 101. He has a peculiar fascination with photographing schoolgirls' uniforms with his camera and unusually large mirror; frequently strapped on his back. He is good friends with Tofu Tofukuj
Kura Ge
Hibiki's pet dog, Lulu ends up using Kura Ge as motivational
collateral for the unpaid rent. While the breed of Kura Ge is never mentioned, he seems to resemble a
Bichon. Kura Ge can usually be seen with a wooden sign hung around his neck that read feeble pointers or, more often than not, comedic statements.
Tofu "Kochi" Tofukuji
Tofu Tofukuji is a
retired, elderly man lodging at the Gochiso apartments. He harbors a
hebephilic interest in Fuko Kuzuha, shown by his photograph collection littered on his apartment walls. A (mostly) harmless, kind-hearted man, Tofukuji is often willing to sacrifice his own safety and freedom to help Hibiki; or otherwise satisfy his craving for
upskirts. He is good friends with Mori Koji.
***Cross-dressing and a
taboo teacher-student romance are the main engines of conflict in this story, although the various characters' other concerns (such as the students' various romantic interests in each other) serve to complicate the story with many significant subplots. In spite of the many possible gender-bending implications of cross-dressing, there is no actual
lesbianism or
homosexuality in this story, other than a few characters mistakenly believing they have identified it in others and/or themselves. The teacher-student romance develops within this context, and is resolved along with it at the end.
Ayu and Nina
Tsujiai and Kaji
