|Occupation||High School Student|
|Family and Relatives||Shun Hazama (father/half-uncle)|
Wakaba Nijou (mother)
|Seiyuu||Natsumi Takamori (under name "Toa Yukimura")|
Hanon Nijou (二条 葉音 Nijou Hanon) is the older sister of Kazuha and Futaba Nijou. She first made her appearance in Cross Days and often appears with Niki Ookuma, her best friend. Unknown to everyone, Hanon is one of the "other women" of Kyouichi Kasannoin. Like Ai Yamagata, Hanon also went to the same middle school with Makoto and was rumored to have fallen for him as well. She is popular with male students from other schools and is rumored to have sex with minors.
Like her younger twin sisters, Hanon sports sandy brown bob cut hair with greenish-brown eyes and bears an exact appearance as theirs. The only way to differentiate her from her sisters is her blue headband. She is shown to wear a Watajo Uniform during the event of Cross Days and black hoodie with a skirt in Shiny Days.
Hanon appears to be an outgoing person, similar to her friend Niki. She is also known to have had many sexual partners through her compensated dating activities, and is known to be joking around a lot. Hanon doesn't get along with Otome Katou due to the latter beating her up when she was mistaken to be interested in Makoto like most other girls in their middle school, although she gets along fine with Otome's younger sister, Karen Katou.
She also appears to not have good relationship with her mother since she rarely stays at home to look after her younger sisters due to her sexually active lifestyle. Despite that, Hanon appears to be skilled in taking care of them since she puts Itaru to sleep easily, something that Makoto notes.
- Her name means "Sound of leaves". Unlike her younger sisters, her name doesn't contain kanji for number; in this case, zero. However, her name still fit the theme as the "non" part could be pun on "none" which mean zero.
- Her surname "Nijou" comes from the Nijou Clan.
- Interestingly enough, she is one of the few female characters to not have any interest in Makoto Itou, nor having any sex scene with him. In addition, despite being stated to be one of the most sexually active characters, she's not shown to have sex with anyone on screen wither in the main games or Strip Battle Days.