Toaru Kagaku no Railgun Manga Chapter 091

"Navigation" is the 91st chapter of the Toaru Kagaku no Railgun manga series, released on December 26th 2016.

Major events

 * Mikoto continues her battle with Ryouko with the support of Misaki.
 * After supporting Mikoto for their own ends, Scavenger successfully completes their mission on a technicality and abandons Misaka Mikoto.

Characters
By order of appearance:
 * Kuriba Ryouko (Doppelganger)
 * Naru
 * Misaka Mikoto
 * Leader
 * Shokuhou Misaki
 * Yakumaru
 * Seike

Abilities

 * Railgun (Electromaster) - Misaka Mikoto, Level 5
 * Mental Out - Shokuhou Misaki, Level 5
 * Predator - Leader, Level 3 (referenced)
 * Ability involving control of the friction coefficient - Seike, Level 3

Locations

 * Academy City

Referbacks

 * Mikoto notes the similarity between the Kuriba Ryouko Doppelganger and Sherry Cromwell's Ellis golem she fought after the end of summer vacation back in the 6th novel volume of Toaru Majutsu no Index.