Mugino Shizuri is a villain in the light novel and anime series A Certain Magical Index. She is also the leader of ITEM, the underground peacemaking organization and one of Academy City's Level 5 espers. She is ranked #4th and has the ability "Meltdowner". She can retain "pure" form of electrons (fix them in an ambiguous state which is neither a particle or a wave, and manipulate them into a beam which can melt down pretty much anything. She is also responsible for Frenda's death. She is voiced by Ami Koshimizu in the Japanese version of the anime and Lydia McKay in the English version.