Himegami Aisa

Himegami Aisa (姫神 秋沙) is a recurring character in the Toaru Majutsu no Index. She is a person who posseses "Deep Blood", an ability which attracts and harms vampires.

Background
Known as "Deep Blood", she has the ability to attract and kill vampires, resulting in many of her friends dying. This prompts her to go to Academy City, hoping to find a way to get rid of her powers. She meets the alchemist Aureolus Izzard and cooperates with him because he told her that her blood can be used to save the life of a person he cared for (Index) in return for helping her get rid of her powers.

According to the novels Himegami's dream isn't to live a normal life, but to become a 'magician' like those in fairy tales who can even disregard the laws of nature, to save people that have been abandoned. She has this dream because her village was all turned into vampires by a passing vampire that was afraid of her ability, and decided to turn everyone into vampires to kill Himegami, but in the end they, the intruding vampire, her friends, her parents, all were killed by the ability Deep Blood. At the start of vol.2, she joined Aureolus for the short term goal of sealing her power so she can't kill vampires, and afterwards to continue the dream of becoming a magician.

Apperances
Aisa looks like any normal teenage girl. She has long straight black hair, and is often seen wearing her |shrine shrine maiden clothes. After the events of the second volume, she began wearing a crucifix given to her by Necessarius, as so vampires will not get attracted to her blood.

Personality
A quiet young girl with a rather blunt personality, generally soft-spoken and sometimes shy. She can be as gluttonous as Index, which is shown when she was trying to buy out all hamburgers at one restaurant. Because of her ability it has made her miserable because her friends and family were killed by her ability. Ever since Touma saved her life, Aisa started to have feelings for him, which is ironic as she once joked that Touma's life was like a dating sim.

She also has a kind and considerate side, shown during the Daihasei Festival after she was recovering from the near-fatal injury caused by Oriana Thompson, she once thought about leaving Touma and everyone else since she seems to only be a burden to Touma. She thought she doesn't have any special talents that can help Touma, nor is she the kind of person that can help others just by her presence like Index. Though Index quickly told her that's not true, as Himegami is everyone's friend and a valuable person to everyone that's worth saving.

Deep Blood Arc
Aisa is first introduced in the Deep Blood Arc. She becomes a major concern to the magic side, as she has been apparently abducted by Aureolus Izzard, a powerful alchemist who has taken over Misawa Cram School and an enemy of the Roman Catholic Church. As such the situation has become complicated with, Stiyl Magnus is recalled back to Academy City to rescue her. Even though Academy City is unable to intervene with the magic side's affairs, Aleister Crowley allows Stiyl to borrow Kamijou Touma's help, as he has deems him as not a threat to the magic and science side's secrets.

Aisa is first seen in Macronall Hamburger, having spent all her money on hamburgers and unable to go home. Touma and Index meets her, where she tries to borrow money from Touma but is refused so and with Index arguing with her for claiming to be a magician without proof. She is later escorted by teachers of Misawa Cram School, making Touma suspicious.

Touma later realizes after being involved by Stiyl, that the person they are trying to save is Aisa. Aisa meets Touma again within the confines of the school and tells her the reason why she joined Aureolus.

When Aureolus learns Index's life was already saved by Touma and tries to kill him, Aisa attempts to defend Touma, which prompts Aureolus to use his alchemy to try to kill her as she was now useless to him. Her life was saved by Touma who dispelled the spell on her with his right hand. When she asks Touma about why he saved her, he told her that he did not have a reason to rescue her. After the incident, she starts to live with Touma and Index but later moves to Tsukuyomi Komoe's Tsukuyomi Residence.

This arc does not occur in the manga adaptation of Toaru Majutsu no Index.

Sisters Arc
She is given a British Puritan cross that is able to seal off her ability, which according to Index is the bare minimum of what makes up a 'Walking Church' barrier. She subsequently becomes a student at Touma's school and is in his class.

After the events of vol.2, Necessarius gave her a Celt cross-pendant from the 'Walking Church', which can generate and maintain a minimum barrier to seal her ability. And since then, she has transfered to Touma's school in order to be around him, and in doing so, hopes that if she stays with him she'll achieve her dream and get him to noticed her more.

During the Sisters Arc, she is first shown trying to find a way to get rid of the fleas on Sphinx, with her suggesting to use an insecticide spray on Sphinx. When Touma brings Misaka 10032 to his dormitory, she comments on him being a protagonist of a dating sim, and how he raises flags and inevitably gather girls around him. She is later seen with Komoe and Index, partaking in various activites such as eating and going to a certain bathhouse, while hearing Komoe's explanation on how esper abilities work.

Kazakiri Hyouka and the Imaginary Number Sector
Aisa becomes the new transfer student of A Certain Highschool. She tells Touma on how she has heard of Kazakiri Hyouka while being in Kirigaoka Girl's Academy, that she is the key to the Imaginary Number Sectors and warns him to be careful of her. She is asked by Touma to join him with Index and Hyouka to go to the Underground Mall, but is disappointed that she is unable to as she is asked to run an errand by Komoe.

Later, during Sherry Cromwell's attack on the mall, Aisa tries to call Touma on her phone but is unable to get through to Touma properly - interstingly, Komoe was able to get through Touma just fine. She and Komoe and later scolds Touma in a certain hospital for his reckless behaviour.

Poltergeist Arc
Aisa gets a cameo in episode 17 of the Toaru Kagaku no Railgun anime. Here, she is seen ordering all the hamburgers in the Macronall Hamburger. Tessou Tsuzuri, a member of Anti-Skill ask her why she wants all the hamburgers, with Aisa answering that she likes their taste. In this episode, it is indicated by Aisa's crucifix that the Deep Blood Arc has already been concluded. Also, Aisa also states that she is from Kirigaoka Girl's Academy, which would imply that she has yet to enroll in a certain highschool.

In the final episode of the anime, she is seen with Komoe in the epilogue.

Abilities

 * Deep Blood: Her blood attracts Vampires, drawing them in against their will mostly. Upon drinking it they automatically turn to ash.


 * Stun Baton: She has one and calls it her "wand".


 * First Aid: She has been trained in first aid.

Trivia

 * Himegami's surname is a pun based on her look. With the character 姫 which means 'princess' and 神 which means 'hair', this is a reference to her hairstyle, which is often associated with princesses as well as shrine maidens in anime.

Quotes

 * (To Touma)"Lend me 100 yen since I'm beautiful."
 * "Perhaps, that is his fate. He raises flags with other people and goes down their story routes." -referring to Touma and his ability to attract girls.
 * (To Touma)"I'm a girl who goes unnoticed after all, huh?"
 * (To Tsuzuri)"Their taste is unforgettable. So I want them all." -referring to hamburgers.