Hino Jinsaku

Hino Jinsaku (火野 神作) is a character introduced in Toaru Majutsu no Index. He is a serial killer with multiple-personality disorder. He escapes imprisonment, and during the course of the Angel Fall Arc, his submissive personality takes over. Due to his nature of calling out to his "Angel-sama", he becomes the first suspect of its activation and the primary antagonist of the first half of the arc.

He does not appear in the anime adaptation.

Appearance
Jinsaku appears as a frail and skinny middle-aged man with beady eyes, he seems to have signs of male pattern baldness. He also has a shrill voice.

His eyes show signs of being out of focus, or focusing in different directions.

Personality
In his form during Angel Fall, Jinsaku appears to be totally helpless to the heed of his "Angel-sama", a probable auditory hallucination that commands him to do sacrifices. During the time of Angel Fall, his right hand however, shows signs of his normal personality, writing words involuntary from the currently-dominant personality. Such as writing hospital on the ground when Jinsaku is gravely injured, even though he is constantly rambling.

Jinsaku also shows no problem of self-harm, if its a command from his "Angel-sama" or his subordinate personality in his right hand.

Jinsaku specializes in using psychological fear and irritation to cause the prey to be immobile, it is unknown if he is aware that he is doing it.

Background
Jinsaku has a history of being a psychiatric patient, and prior to the events of the arc, had killed 28 people in ritual killings, and had become an internet cult sensation, leading to people to admiring or even outright imitating him.

Despite the doubt of the culpability of his crimes due to his multiple personality disorder, he was found guilty of murder and was later convicted incarcerated in Shinfuuchuu Prison in the Kanagawa Prefecture as prisoner number 710687. The debate regarding his responsibility in the murders were still up to date during the time of Angel Fall.

The day before the activation of Angel Fall happens, Jinsaku manages to escape Shinfuuchuu Prison. It is unknown if Jinsaku escaped before the switching occurs. Jinsaku manages to gain supporters and allies, and even wanted to use one of those people's apartment as a hiding place. However, the police has managed to cover a faster than he anticipated and he is forced to take refuge in Wadatsumi.

He is already injured, probably due to self-harm, before he attacks Touma.

Angel Fall Arc

 * Main article:Angel Fall Arc

Jinsaku arrives in Wadatsumi to seek refuge from the police. Here, he is hiding under the floorboards of the ground level, just below Touma, who is watching television, coincidentally about Jinsaku. After he confirms to his "Angel-sama" if he wants Touma to be sacrificed, he attacks him right under the floorboards. He misses, but due to his actions, has shadowed fear into Touma, as such he is unable to counteract as Jinsaku grabs his foot.

Touma is saved by the timely arrival of Misha Kreutzev, who destroys the floorboards and dives into Jinsaku's hiding spot. She ruthlessly mangles Jinsaku's left wrist and pulls out his teeth in the struggle, which forces him to the surface. He tries to attack Touma again, but he was smart enough to distract him using his cellphone, allowing him to create more distance between them. As Jinsaku rambles on about "Angel-sama", Touma begins to recall on how his appearance have yet to change despite Angel Fall. Jinsaku then stabs himself suddenly. However, Misha finally comes out of the floor and destroys one of his teeth that she pulled a while ago. As retaliation, Jinsaku throws his poinson-tip blade, which grazes Touma. Jinsaku later escapes as Misha was then forced to treat Touma for the poison.

Tsuchimikado Motoharu, Kanzaki Kaori, and Misha Kreutzev, with Touma's input, later determine that Jinsaku is the number one suspect for casting Angel Fall. They later discover that Jinsaku has holed himself up in a residential area, specifically, Touma's house, with police officers and media personnel hounding the scene. Using a bit of magic, the gang manages to transfer the police's concerns to another house, believing it to be Touma's. There, in the souvenir-filled house, they discover that Jinsaku has covered the windows and doors, darkening the place, as well as let out a gas inside the house that would cause an explosion. Touma and Motoharu, who were assigned in the ground floor, first encounters Jinsaku. He tries to ambush Motoharu, but Touma manages to tackle his friend to the ground. This forces Jinsaku's attention onto Touma, but his weapon gets kicked out of his hands by Motoharu. Touma tries to charge towards Jinsaku, but he flees along with his blade. Motoharu pursues Jinsaku instead, and tells Touma to turn off the gas. Touma later sees Motoharu fight Jinsaku, using Touma as a distraction, he easily takes him down with a single hit. They later interrogate him, but still Jinsaku continues rambling on about "Angel-sama", not knowing what they are talking about, and writing sporadically on the floor with his right hand. This annoyed the magicians present, with their interrogation going out of nowhere. Kaori threatens Jinsaku with death, however, Touma saves his life by telling about Multi-Personality Disorder, thanks to Komoe's lessons. Here, they conclude that Angel Fall has switched the dominant and subordinant person, therefore, not the culprit of Angel Fall, and that his right hand is the true personality that has been kept inside by the switch.

Touma leaves with Kaori to go after Misha, who was after Kamijou Touya, the true culprit of Angel Fall, with Motoharu left alone to deal with Jinsaku. It is unknown what happens next with Motoharu at that time, but it is later revealed that Jinsaku has been recaptured.

Design evolution
Jinsaku appears only once in the series, and as such his design remains static. His design is based off Gollum from the Lord of the Rings. Fitting, due to his obsession with his "Angel-sama", which is comparable to Gollum and his obsession with the One Ring.