Karakter & Staf — OniAi

Anastasia Nasuhara

Utama

Saint Liliana High School second-year student and the Vice-President of the Student Council, and the daughter of the owner of Nasuhara industry, a world-wide company. Anastasia has Russian and American parents. She has a cold personality and often asks strange questions, such as asking Akito if he is a cherry boy when they first met. She is the rival of Akiko and is proud of that she wins a small bit on almost everything, including height, grades, breast size, the rank during Miss Saint Liliana High School Election, and Student Council rank. However, she is extremely weak at house chores due to her wealthy family, to the point that she will gladly admit it and escape her chores. She also loves cute things, and not only keeps lots of plush dolls in her room, but also love to play with Arisa. Anastasia demands that Akito calls her Ana, but laughs at him for calling a girl "hole" (because Ana means hole in Japanese) whenever he does so. (Source: Wikipedia)

Minori Chihara

Akiko Himenokouji

Utama

Saint Liliana High School Second year student. Akiko is Akito's sister, and has a pretty appearance and polite manners. However, she has very serious brother-complex, and is taking a very active way to seduce Akito. She is also very proud of her brother complex and makes no effort of concealing it. She is the secretary of Saint Liliana High School Student Council, but is very reluctant when Akito interacts with other Student Council members.

Ibuki Kido

Arashi Nikaidou

Utama

Saint Liliana High School student attending the 2nd year and the President of the Student Council, Arashi has a ponytail and is seen often wearing an eye-patch on her right eye. Under the eye-patch is usually a red-colored contact lens. She is also seen often carrying a real katana. She is also known to not wear any underwear at all. She has the 1st grades on 3rd year and has powerful leadership, that she can't only handle most Student Council chores by herself, but also take control most of the school's activity.

Eri Kitamura

Akito Himenokouji

Utama

Male

The main protagonist. Akito recently reunited with his sister, after being separated for six years, and transferred into Saint Liliana High School class 2A. He is generally lazy and hopes to live a normal life, but he will also work with his full strength to achieve his goal. He started to take care of his sister when he was young, however when their parents died, the siblings got separated when adopted by two different families. After secretly arranging for years he was finally reunited with her and moved out to live by themselves, but only to have find out that she has a brother complex, that developed while they were separated at youth. He loves to trick Akiko, or watching others trick her. He is quite over-protective of Akiko, and people around him often comment about this as having a serious sister complex, although both he and Akiko strongly deny this. Since the siblings are now living by themselves, he secretly makes their living by writing porn novels of brother-sister incest under the pen name "Kouichirou Shindo", and has become a famous author. He is given the job as student counsel's "vice-assistant of proxy of secretary", that Arashi happily claims that's a fabricated position for her underground lover; technically, his is the assistant of the secretary, Akiko.

Ryouta Oosaka

Ginbei Haruomi Sawatari

Utama

Akito's childhood friend. Despite having a boyish name and talking mood, Ginbee is a girl and secretly has feeling toward Akito. Due to family issue, she was taught as a boy and cannot work herself, living only on her family's financial support. She later transferred into Saint Liliana High School and became the accountant of the student council. Despite the fact she even dared to move and transfer schools to follow Akito, Akito often refers to her as his best (normal) friend unintentionally, which disappoints her greatly. She has a habit of mumbling about Akito's unawareness whenever Akito overlooks her feeling. (Source: Wikipedia)

Asami Shimoda

Arisa Takanomiya

Utama

Arisa is a genius, despite being only 12 years old, she has already graduated from a famous university, and her essay is on multiple famous professional magazines. She is also good at house chores. At the end of the 4th novel, she moved in to live with the Student Council members. While most of the Student Council members prefer to say that the engagement doesn't count due to her age, Akiko is the only one that views her as a love rival. However, after an argument of who is better for Akito, the two worked together as they noticed that Akito sees both of them as his sisters. She has a habit of going silent and showing emotions on her face, which is so cute that people who see it can't resist accepting her will.