Amaha Nene

Nene is part of the same as Itsuki and they are childhood friends. She is very sociable and can get along with anyone, being liked by everyone at school and in the "family".
According to the "tradition", children of the "family" must have an arranged marriage, but Nene is allowed an exception and currently has no partner. From a young age, she has thought of Itsuki as "hers", and her feelings remain unchanged regardless of whether Itsuki has a fiancée. She closely observes Itsuki's every move and records details in her "Ikkun Memory Notebook", which currently contains 62 volumes. She keeps a watchful eye for any women who approach Itsuki, and she devises various strategies to keep him away from them if necessary.