“Do whatever you want, but
I’m not taking any part with a battle against Accelerator.”

“Ah?”

“My Measure Heart regulates the distance between people’s hearts. So if I take the
distance of the person Accelerator is closest to, I may be able to make him hesitate in
attacking.”

“And?”

“But not everyone reacts to feeling like the person closest to them is enemy by stopping
their attack. Some people go into a frenzy and come in with an even harsher attack
because they feel that person has betrayed them. ...Can we trust Accelerator to not do
that? Sorry, but I get the feeling he would attack me no matter where I set the distance
to. He’s too muddy to read.”

-Toaru Majutsu no Index Volume 15 Between the lines 4