

In _A Certain Magical Index_ , Accelerator says something about reversing a
person's bioelectricity. What happens to a human body when he does this?


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a-certain-magical-index
What does reversing a person's bioelectricity do?


Reversing a person's bioelectricity would result in that person's death.
Accelerator has demonstrated his ability to manipulate bioelectricity several
times in canon. My first example is in volume 5 of the light novels of _A
Certain Magical Index_ , when he manipulates Last Order's bioelectricity to
erase the virus. There are also references to reversing a person's bioelectric
field.

From pages 148-149 of the Yen Press edition of volume 5 (emphasis mine):

> He had so much power, but all he could think of was **blowing people up** by
> touching their skin and **reversing** their blood or **bioelectric field**
> \-  
> ...  
>  
>  If he could reverse the direction of somebody's blood flow and bioelectric
> field just by touching their skin...  
> ...  
>  
>  "Hey, If I can control her brain's electrical impulses, I can mess with her
> personality data without having to use a Testament, right?"  
> ...  
>  
>  "There's nothing I can't do. **I killed people by reversing** their blood
> flow and **electric fields** just by touching their skin during that
> experiment, yeah? I can reflect stuff already, so it's not strange that I
> can go beyond and control it."

Here, Accelerator confirms that he has killed people by reversing their
electric fields, and implies that they exploded.

In the _A Certain Scientific Accelerator_ manga volume 4, Accelerator
demonstrates his ability to mess with someone's bioelectric field(he doesn't
say anything about reversing it, however). In chapter 17, Accelerator messes
with the bioelectricity of one of the members of Scavenger, Seike, knocking
Seike unconscious. Accelerator's dialogue from the scene:

> Did you know there's something called bioelectricity that runs inside human
> bodies? I'm gonna mess with it a little, heh. Enjoy!

The subsequent panels show electricity radiating from Seike's body. Blood
erupts from Seike's nose and ears, saliva drips from the mouth, and the eyes
roll up. The end result is Seike unconscious, with a look of anguish.

Finally, volume 3 of _A Certain Magical Index_ references this ability. From
page 189:

> Those hands could alter the vector of anything they touched... For example,
> a simple stroke of the skin would allow him to reverse the flow of blood in
> [Kamijou's] veins or the direction of the bioelectric field around his body-
> either way, the person's heart would explode.

Here it is implied that reversing a person's bioelectricity will cause their
heart to explode.


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