Misaka Sisters - Sensing Electrical Power Use

A *Sister* can sense electrical powers being used from 600 meters away.

> "Then I guess you must be twins. Hmmm, it's the first time I've seen identical twins, but you two really do look identical. Well, what are you going to do, Futago-chan? Return to Nee-chan?"

> Mikoto had been continuously, continuously glaring at Imouto for some time.

> "How overly naive of this shallow rascal, so Misaka will answer your question so that you may catch on. Misaka came to see and confirm the one with the same power detected within a 600-meter radius of Misaka…"

-*A Certain Magical Index* Volume 3, Chapter 1, Part 2, Page 11