speed matters (in base)

Mina Mathers was “something shaped the same as a person”. She was actually a grimoire, so she was not a human or even a mammal. Thus, her skeleton, muscles, and various organs did not need to move in the normal fashion.

And that meant she could entirely ignore the upper limits of the human body which was bound by calcium and protein.

By the time Accelerator saw her, he could already feel the pressure of the tightly clenched fist striking his entire face. The strength of the word “reflection” was entirely blown away.

It had not functioned at all.

The black cat witch’s right hook caught the #1’s cheekbone and she continued swinging with her entire body weight behind it. The great roar of impact only arrived after a short delay. When she saw the slender form quickly spin around, Mina Mathers whispered to him.

“Even the #1’s reflection is reliant on the calculations you use to control that power. Simply put, you cannot control any vectors with which your conscious and unconscious calculations cannot keep up. Of course, with the brain of Academy City’s #1 and the Misaka Network at your disposal, that would not normally present any kind of problem. …Yes, unless you began a benchmark test with a true processing device. And even if I have been freed from the bonds of that largescale parallel processing device, I am still doing the Thoth Tarot.”

-Toaru Majutsu no Index: New Testament (Light Novel) - Volume 19, Chapter 1