Mugino Shizuri

One of the seven Level 5 espers, ranking fourth after Mikoto Misaka, and is one of the antagonists in the Toaru Kagaku no Railgun manga.

She is the leader of ITEM, which is at odds with SCHOOL, which is led by second-rank Level 5 Teitoku Kakine. She looks down upon lower-level espers and does not mind eliminating people who get in her way or go against her, regardless of whether they are allies or enemies. Her overconfidence eventually results in her defeat against a Level 0 drop-out (Hamazura Shiage).

Plot
Prior to the events of the novel, she and her group are hired to stop Misaka from destroying the facilities involving the experiments with the Misaka clones and Accelerator. During the events of Volume 15, she loses her left arm and part of her right eye to Hamazura Shiage. In Volume 19, they are replaced with masses of energy with the help of her own power. She is currently after Hamazura and wants revenge.

Abilities
Her ability is, which converts electrons into unstable destructive matter. She can use her ability to fire up to four laser beams at once, create a defensive shield that can melt/disintegrate steel, and supposedly her ability even grants her the ability to turn intangible like energy, and phase through attacks.

Unfortunately, her ability is highly unstable, as demonstrated when her arm and right eye was lost when she used too much of her power.