Kaori Kanzaki

Though she rejected the Amakusa Christians, she still feels a sort of longing for them, and eventually returns to them (they are now a part of Necessarius) to become their leader once again.

It is likely, as many of her comrades are named after places in theNagasaki Prefecture, that her name is derived from the Kozaki Catholic Church that can be found in Sasebo, Nagasaki. The kanji that the church uses for its name (神裂) is similar to Kaori's family name, Kanzaki.

In Volume 4, Kaori's family name 'Kanzaki' can be translated as The Breaker of God which makes reference to her developed ability to even kill gods from the Amakusa Church Style Remix of Church.

She was tremendously blessed as a child. She was born as a Saint, and was chosen to be the Supreme Pontiff of the Amakusa-Style Remix of Church since birth. She has the uncanny ability to succeed in no matter what she does, though she realizes that when something fortunate happens to her, something misfortunate happens to others in turn. However, those people who are misfortunate, still admired her regardless, and through hither, Kaori became disillusioned with her sect, blaming herself for their misfortune. This led her to despise the concept of luck and fortune as her fortune in turn only bring misery to those around her from what she can see, as it has been mentioned in the novels she no longer wants to see innocent people rushing to protect her, dying in the process, and saying with their last breath that it's alright as long as she's fine.

Three years before the start of the series, Kaori defects from the Amakusa-Style Remix of Church to the Anglican Church, and becomes a part of the Church of Necessary Evil. There, she meets Tsuchimikado Motoharu, who teaches her proper English, as well as Stiyl Magnus, and Index, where they become good friends.

She is later told by the church that Index needs her memories erased once a year, since her mind has been overloaded by too much information since she only has 15% of the brain left for the rest of its functions. Having found no way to have Index preserve her memories, she opted to take pictures of them together one last time. Both Kaori and Stiyl are later persuaded by Laura Stuart to erase Index's memories, weeping by her side and giving her the pictures that they took in memory of the time they spent together. Even then, both of them tried to create new memories with Index, but later grew weary of the process of trying to make new memories with her and the fact that Index was often pained when she realized that she would forget them again, because of this they gave up, and allowed Index to believe that they were enemies of hers and were after the Grimoires.