Kill Bear

Kill Bear or Kirugumar (きるぐまー) is a mascot found in merchandise in the Toaru Majutsu no Index universe, although, it is not as pervasively present as Gekota. Misaka Mikoto is a fan of the character.

Etymology
The name comes from the romanization of the English word "Kill" (きる), which is "Kiru", while ぐまー is the hiragana for the word "bear" (熊), which is read as "gumar". As such, the name of Kirugumar is translated as Kill Bear, probably referring to its appearance.

Appearance
The bear is a designed to be have an assortment of medical paraphernalia attached on its body, such as bandages and stitches. Most prominently, it has an eyepatch with eye drawn upon it.

Background
Not as pervasive as the Gekota character, as so far, only a stuffed bear and stationary set has been shown in the Toaru Majutsu no Index universe.

Sisters Arc
The bear plays an important role during the Sisters Arc, after Mikoto collects documents regarding the Level 6 Shift and the facilities that are part of it, she hides them inside the stuffed bear Kirugumar she has when Shirai Kuroko rudely barges into their room. It is later hidden by Mikoto under her bed.

Later, when Touma visits the Tokiwadai Dormitory to inquire Mikoto of her involvement in an experiment where clones of her are killed. He is forced under Mikoto's bed by Kuroko as the Tokiwadai Dorm Supervisor arrives into the room. There, Touma discovers the bear and the queer object therein, and later finds out that the documents that Mikoto was hiding. Angered by his discovery, Touma opts to find Mikoto.

Toaru Kagaku no Railgun
Mikoto's Kirugumar Stationary set is put up for auction to help Child Errors in Academy City during the Tokiwadai Midsummer Festival. Kuroko outbids everyone in the auction.