Genma Iroe

Iroe is a fair-skinned high school girl with long honey blonde hair and dark brown eyes. She wears her school's uniform, consisting of a white shirt, navy blazer and a red sailor ribbon bow. She wears a dusky grey skirt, white socks that come to just below her knee as well as brown school shoes. On her head, she has a red and white castle model on her head. She tends to have a foul an sharp mouth quick to make sharp remarksModel Making - Being the leader of the Model Club, Iroe is good at making models, but she can easily break them too. Strength - Iroe is pretty strong, both physically and mentally. She can hand-wrestle Hazuki, though she ends up losing, and she can withstand some good physical punishment. Tennis - Iroe is a good tennis player, though the game infuriates her. Flexibility - Iroe is very flexible, able to hook her legs around her head. Gymnastics - Iroe is pretty good at somersaults and handstands. Likes: Being seen as cute, Her club, Teasing (borderline bullying) her friends, Laughing at someone's expense, Models, Being competitive Dislikes: Hazuki when she gets aggressive, Saotomi's antics, Her body's development, Makina's army tank model's soldier

Hazuki "Okappa" Okamoto An underclassman of Nee-san, Hazuki is one of the members of the Model Club, nicknamed "Okappa". She is a classmate of Makimaki and sits next to her in class. She is generally levelheaded and calm but is prone to getting violent and monstrous when it comes to Nee-san's antics. She is shown to have a gentle and caring side, later attributed to sporadic "Okappa Days". She is weak against insects, especially large cockroaches. She has a model of a train on her head before she loses interest in models.

Makina "Makimaki" Sakamazaki An underclassman of Nee-san, Makina is one of the members of the Model Club, nicknamed "Makimaki". She is a classmate of Okappa and sits next to her in class. She is the most rational member of the Model Club and plays the role of the straight man to Nee-san and Okappa. She was overweight throughout elementary school before rapidly losing weight in middle school. A model of a tank sits on her head before she loses interest in models.

Kuniki A high school senior, Kuniki is the muscular captain of the baseball team. He wears women's underwear and often exposes himself in public. Because of this, he is well-known even in other schools.

Mizuno A 33-year-old teacher, Mizuno teaches Health education. Despite her age and status, she still calls Iroe "Nee-san." She is also the best friend of fellow teacher Masuda whom she affectionately refers to as "Masuda-chan." She has bitter memories of her ex-boyfriend breaking up with her because of a hairy back.

Azuma A high school freshman, Azuma is often seen with his partner, Student Council Member A. The pair were once cornered by a pair of delinquents but were "saved" by Kuniki. Because of that encounter, they are now scared of him. It is also revealed he lives alone and subsists largely on junk foods such as sweet buns.

Sanada A high school senior, Sanada is a classmate of Nee-san. He calls Nee-san "Chibiko". He is a member of the basketball team.

Saotomi Ishihara A high school senior, Saotomi is a chubby, mysterious schoolgirl with self-proclaimed "beauty". She believes that hair and skin care is important and usually gives the Model Club her unneeded advice.

Uno She is the twin sister of Sano. Nee-san usually hangs out with them if she's not with the Model Club. Like Nee-san, she has a short stature and a flat chest.

Sano She is the twin sister of Uno. Nee-san usually hangs out with them if she's not with the Model Club. Like Nee-san, she has a short stature and a flat chest.

Tada A high school freshman, Tada is a member of the baseball team. He likes over-the-knee socks, especially Makimaki's.

Cindy A gigantic high schooler, she is shown tormenting the twins Uno and Sano and forces them to make mochi for her.

Yuria Himekawa A high school senior, Himekawa is a classmate of Nee-san. Like Sanada, she calls Nee-san "Chibiko". She is a staff member of the basketball team. She is tall, beautiful and has large breasts, and because of this, the boys in her class sent her résumé to an entertainment office. Her birthday is on August 23.