Tetsumou

Tetsumou (鉄網) is a minor character in the Toaru Majutsu no Index series. A member of BLOCK, she is an esper of unknown level.

Personality
She has been described as a gloomy girl, a stark contrast to all of the serious, professional soldiers that she has to deal with.

Battle Royale Arc
In her debut appearance she is asked by Saku Tatsuhiko, the leader of BLOCK, to verify the identity of the people present in the room with her ability before BLOCK's operation can begin. While analyzing a random grunt, the hands of both of them suddenly burst into flames, and she loses a few fingers of her right hand. The shock and blood loss then renders her unconscious, which prompts the grunt to reach for the first aid kit, but Saku executes the grunt despite his pleas.

Noticing that Tetsumou could no longer function as a polygraph, Saku shows no interest in her condition, saying that there isn't any time to "find a replacement" and instructed some of his men to take care of her body.

Etzali, who is using the appearance of Yamate, is then revealed to have hid a small quantity of liquid explosive inside some hand cream and had gotten it on that grunt's hand; as soon as the grunt held hands with Tetsumou, a small explosion was ignited. Etzali regrets the result, but he also realizes that if he hadn't used such a measure, he would have been killed and no one would be able to stop BLOCK's revolt.

It is unknown what exactly happened to Tetsumou afterwards, but it is known that Academy City's facilities can perfectly treat wounds far worse than a few lost fingers without even leaving scars.

Abilities
Her ability is named Skill Polygraph (意見解析 (スキルポリグラフ) ) and allows her to verify the profile of a person as long as she holds hands with her target. The "voice" that she uses to read the profile of her target is not her regular voice but an "inhuman, mechanical-sounding" one. Along with their basic information, such as name, age, and occupation, she can even read important facts that have happened to them in their past.

Quotes

 * "Reading people’s minds is all I’m good at.” - To Saku Tatsuhiko, Volume 15 Chapter 2 Part 3