Kanzaki Kaori

An eighteen-year-old magician from Necessarius. Unlike her partner Stiyl, she uses magic to magically strengthen her body. Her sorcery name is Salvare000, "The one being saved becomes the hand that saves".

Appareance
She's a rather tall woman with long black hair tied up in a ponytail with a length that reaches her hips and has a nicely shaped body. One can easily associate her white skin with that of a princess. Wears a short T-shirt with a knot-tied at the bottom, revealing her navel; a pair of jeans below with one side sawed off, revealing her thigh. Because the T-shirt is tied down, her breasts are much more noticeable. One can see her snowy white leg, from the thigh all the way down. She uses a two-meter-long nodachi called "Seven Heavens Seven Swords" as her weapon.

Personality
When she was young she was destined to be the High Priestess and leader of the Amakusa Catholics and was to be protected at all cost. Due to this she believed they were suffering because of her. Later she travels to England where she befriends a young Index and Stiyl. She grew attached to Index and loved her as a sister. But when it came to the memory wiping Index did not see her as the friend she was, which made her into a cold and silent woman. But after finding out the truth about the memory wiping she and Stiyl decide to leave her alone. Her personality gradually changes showing a kinder side to herself and others after Tōma saves Index and helps to confront her past with the Amakusa Catholics, feeling more comfortable and grateful to Touma becoming more prone to showing emotion and sometimes showing a little embarrassment if she is with him, having awkward interactions from her trying to thank Touma for saving the members of the Amakusa Church on various occasions and Tsuchimikado Motoharu's attempts to encourage Kaori into various cosplay gear.

It is an alternate interpretations if whether Kanzaki getting nervous when she's around Touma is due to a crush or just being nervous due to being indebted to him for saving the Amakusa people many times.

Index and the Church of the Necessary Evil
First time, she shown as an antagonist who fights Touma and defeated him, later she tell the reason why they doing this. Later in the novels, more of her past is revealed. Not only is Kaori a skilled swordsman, but she is a Catholic Saint possessing the "Stigma", the ability to call upon God's power and the former leader of the Amakusa Catholics; however, Kaori left the group as she resented that she had been fated since birth to become its leader, which 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. Although she is Catholic, she joined Necessarius as it's a group which even her fortune won't rob them of their lives and befriended Index, developing a sisterly relationship with her. The repeated failed attempts to make Index remember her after each memory erasure resulted in her cold personality as Kaori began to accept that no matter how much a person tries, no one can change their destiny.

Oriana Thompson and the Daihasei sports festival
During this story she doesn't has a real participation but Tsuchimikado tricks Oriana Thompson claiming he used a spell to call for the help of a Saint like her, causing Oriana to run awaw.

Aqcua of the Back's attack
She arrives on Amakusas fight against Acqua of the back takes their places ordering them to get away of the place. In her fight against Acqua of the Back, she realized was as arrogant as Acqua. She brushed off Amakusas thinking they're weaker than her, that they need to be under her care at all time so for the first time she asks Amakusas to help her fight Acqua. When Aqua scoffs at Kanzaki saying if she values her life that much, but to this she replies she's only hurt them by leaving them because she was looking down on them as well. Now she will gain her place back and believe in them instead of blaming them and at the end of light novel, she confused how she thank Touma, Tsuchimikado says to her that this is the only way to pay her debt back to Touma is by wearing a fallen-angel maid costume (Erotic version). Kanzaki in state of confusion told Tsuchimikado to bring the costume and ten minutes later she enters Touma's room and then the "fallen angel accident" happened.

Toaru Majutsu no Index's SS(bundled with Railgun's DVDs)
This story takes place after the events of the Angel Fall arc.

The first part revolves around a man called Elason. He's a person who creates magical restraining and containment devices for the Necessarius. One day, he suddenly disappeared, and if his knowledge leaks out, it could potentially lead to magicians escaping from the London Tower. It's unknown whether he was brought away be some else, or disappeared on his own. Kanzaki was sent to find and bring him back.

At the start of the chapter, Kanzaki and Elason fought, but Elason escaped.

The next day, a messenger (the tour guide) came to the jeans shop where Kanzaki was, and asked Kanzaki and the jeans shop owner to help with the investigation. The jeans shop owner is actually kind of like Kanzaki's "partner" and has knowledge about magic, although he's more like a volunteer. So tour guide, jeans shop owner and Kanzaki went to Elason's house.

There, they found a bunch of "devices" which were not sold to anyone, and the jeans shop owner was asked to analyze them.

Also, they met a girl called Sachiel, the one who noticed Elason's disappearance and reported it. Sachiel was abandoned by her parents when she was 10 and also became a victim of child trafficking. She was saved and sent to an orphanage by エーラソーン. Sachiel wanted to pursue Elason in search of her purpose in life, and kept on escaping from the orphanage because of that. Eventually, Elason knew about it, brought her out of the orphanage, and let one of his neighbors take care of her.

After that, Sachiel offered to help with Elason's work, but he refused. However, Elason eventually noticed Sachiel's abilities to escape. Naturally, as a person who creates restraining and containment devices, this interests エーラソーン. He also found out that Sachiel escaped to search for her purpose in life. Eventually, Elason decided that the only way to keep Sachiel safe is to give her a purpose in life and let her help with testing his creations. Since then, Sachiel sees this job as something that she needs.

When Kanzaki and jeans shop owner left Elason's house, they took a bunch of the devices away to analyze. The tour guide went to St. Julian's Cathedral to meet with the bishop there, since the bishop seems to be concerned about Elason's disappearance.

On the way back to the jeans shop, Kanzaki received a call regarding a Magical Organization that was in contact with Elason before his disappearance. Kanzaki went and fought them, but the organization didn't know anything.

Back in the jeans shop, they started analyzing the devices. The owner used a magic which allows him to see the "magical blueprint" of a device, and asked Kanzaki and the tour guide to do the same and split the work so that they could speed up the analyzation process. They noticed that each of those devices have Cathedral-level strength. Kanzaki then realized that those devices were actually miniatures of the St. Julian's Cathedral, and were made to mimic the security systems in that cathedral so that Elason could analyze them. They deduced that Elason's plan is to attack St. Julian's Cathedral.

Elason easily infiltrated St. Julian's Cathedral, and was able to reverse trap the guards, since he already analyzed the security systems through the devices he created. He went straight to the bishop's room.

Meanwhile, Kanzaki came to the Cathedral. There, she encountered one of the tools created by Elason, in the form of the Gleipnir.

In the bishop's room, Elason restrained the bishop and interrogated him. The bishop is actually the one behind that child trafficking project. The purpose is to give a steady supply of magicians to the Necessarius. However, the child trafficking project is not supported by either the Necessarius or the Church of England. The bishop of St. Julian's Cathedral started the project himself so that he could become a good supplier and get more merit for himself.

As Elason was killing the bishop, Kanzaki came into the room. Then, it was revealed that Elason knew about the bishop's project all along, even before he saved Sachiel. He had planned to kill the bishop all along, but also hated himself for being a hypocrite and getting joy from being a hero and the "purpose of life" for one of the victims of the project. Because of that, he intended to kill himself to completely free Sachiel.

In the end, Elason lost to Kanzaki, and was handed over to the Church for punishment.

Abilities

 * Stigma, the the ability to call upon God's power as a saint who has a body which resembles the Son of God, she is also endowed with super-human capabilities. Kaori uses this in combination with the Amakusa Style to perform magic that can stand up to Christian Angels.
 * Amakusa's Style Combat, as result of merging Shintoism and Budhism, which she performs using her nodachi for combat she the next form of attacks:
 * 1) Seven Flashes(Nanasen), is her main attack uses seven steel wires. The wires then can 'split' into thousands and surround or cut the enemy, though only Kanzaki can go that far due to her attributes as a Saint.
 * 2) Single Flash(Yuisen), is an attack which permeates magic to her sword which is capable of harming christian angels.
 * 3) First Flash(Meisen), is the real attack executed before the execution of the Seven Flashes (From chapter 6 of the Manga, not mentioned in the novels)
 * 4) Multiple spell casting, by using Nanasen she is also be able to cast spells by constructing various 3-dimensional magic circles.
 * Basically, in a fight with her, she can overwhelms the enemy from 360 degrees. The wires, the magic from the wires and then herself. Other skills in the Amakusa Style include excluding civilians from being involved from magician's combat like Stiyl's 'Opila' runes and enchant water to heal all external wounds and scars.

Trivia

 * Some of the 'cosplays' Motoharu suggested are maids, angels, fallen angels and/or ero versions of one or mixes of them, which later on making "fallen angel accident" at the end of the Volume 16.
 * From the SS light novel(also known as volume 13.5), from what Tatemiya Saiji said to decline the Captain of the Knights of England invitation to a ball "You can go home. Our priestess likes to lead a young man rather than being led by an older gentleman", it's now became a rumour that spread across half of London that Kaori has a crush on Kamijou Touma, which from their various interactions between the two leads to many people thinking Kanzaki have a crush on Touma. Even people like Laura Stuart and the Grand Master makes fun of Kaori using this rumour on many occasions.